M.Sc. Chemistry Question paper

Loyola College M.Sc. Chemistry April 2012 Applications Of Spectroscopy Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

FOURTH SEMESTER – APRIL 2012

CH 4809 – APPLICATIONS OF SPECTROSCOPY

 

 

Date : 18-04-2012             Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

PART A

Answer all the questions                                                                                                                 10×2=20

 

  1. State the fragmentation modes of benzene.
  2. Mention the characteristic peaks of an acid anhydride in IR spectra.
  3. What is transannular conjugation? Give an example.
  4. Why a polar solvent usually shifts π®π* transition to longer wavelength and

n®π* transition to shorter wavelength?

  1. Mention any two characteristic signals of primary alcohols in mass spectroscopy.
  2. What is the significance of spectral editing?
  3. Mention the conditions favorable for first-order coupling in NMR.
  4. Compare the coupling constants in NMR and ESR spectra.
  5. How does hydrogen bonding alter NQR frequencies?
  6. What is the influence of energy of gamma ray on  f – factor?

 

PART B

Answer any eight questions                                                                                                       8×5=40

 

  1. Identify an acidic yellow compound which gave the following data:
  2. i) UV: 280 nm, emax = 6600

ii)IR : 3460 cm-1 (s), 3035 cm-1 (m), 1510 cm-1 (s), 1310 cm-1 (s), 740 cm-1 (s). The band at 3460 cm-1 does not shift even on diluting the sample.

iii) NMR : -2.1t  (singlet) 1H and unsymmetrical pattern 2.61-2.75 t (4H).

  1. Deduce the structure of the compound having the molecular formula C5H10O2 giving effervescence with sodium bicarbonate. It shows the following mass spectral patter at m/e values: 102, 73, 60 (100% intensity), 57, 45 and 29.
  2. Suggest the structure of the liquid compound with the molecular formula C6H6O showing a violet colour with neutral FeCl3. The IR absorptions are at 3300 cm-1, 3040 cm-1,  1360 cm-1,  1220 cm-1 and 685 cm-1.
  3. Calculate Lmax for the following compounds:
  4. i) ii)

 

iii)                                                                                iv)

 

 

  1. v)

 

 

 

 

  1. Identify the compound with molecular mass 120 which shows a UV peak at 268 nm (emax = 480).In IR spectrum absorption bands are found at 3067-2907 cm-1 (m), 1608 cm-1 (m), and 1473  cm-1 (m). The NMR spectrum shows absorptions at 3.21t  (singlet) and 7.74t  (singlet).
  2. Explain the IR absorption bands of aniline. The IR absorptions are at 3450 cm-1,  3026 cm-1, 1620, 1602, 1499 cm-1, 754, 696 cm-1, and  1306, 1257 cm-1.
  3. Sketch the 13C NMR of 2–butanone under i) broad band decoupling of 1H and ii) coupling of 1
  4. Highlight the coupling involved in the 1H NMR of 1 – nitro hexane.
  5. What is hyper fine splitting? Discuss the hyper fine splitting exhibited by high spin Mn2+
  6. How will you account for the trend, shown in the ionic character of the tetra chlorides of carbon group elements?
  7. The compound NaAuCl4.2H2O shows four NQR lines. One of the lines shows positive temperature dependence – Explain.
  8. Isomer shift measures principally the difference in valence s-orbital populations – Explain.

 

 

 

 

 

PART C

Answer any four questions                                                                                        4×10 = 40

  1. An organic compound with the molecular mass 108 is not acidic in nature, but can be easily oxidized to a crystalline compound. In UV, it absorbs at 255 nm (emax =202). The IR spectrum shows absorptions at 3402 cm-1 (s,b), 3065 cm-1 (w), 2288 cm-1 (w), 1499 cm-1 (w), 1455 cm-1 (m). The signals in NMR are 2.74t singlet, 5.4t singlet and 6.10t The mass spectral pattern shows m/e values at 108, 106, 105, 77, 51 and 39.
  2. Explain the tetrahedral and octahedral complexes of Co2+ using Orgel energy diagram.
  3. An organic compound with molecular mass 160 absorbs at 210 nm (emax = 60) in the UV spectrum. In IR spectrum, absorption bands formed are at i) 2940-2855 cm-1 (m), ii) 1742 cm-1 (s), 1460 cm-1 (m), 1055 cm-1 (s), 1260 cm-1 (s).  The following signals are formed in NMR spectrum i) 7.5 t singlet, ii) 8.71 t triplet, iii) 5.84 t Deduce the structure of the compound and suggest its mass spectral pattern.
  4. a) What is COSY? Explain with an example, the influence of a prochiral centre in COSY.
  5. b) An enolic proton is downfield compared to an alcoholic proton – explain.
  6. a) How will you account for the transitions, shown by the interaction of an electron with three equivalent protons?

b)35Cl NQR of hexachlorocyclopentadiene shows two lines in 2:1 intensity ratio. Arrive at the point group symmetry of the molecule.

  1. a) Define: Isomer shift and Quadru pole splitting. How are they exhibited by high spin Fe2+ and Fe3+
  2. b) How many NQR transitions are possible for 51V nucleus.

 

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Loyola College M.Sc. Chemistry April 2012 Advanced Coordination Chemistry Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

FOURTH SEMESTER – APRIL 2012

CH 4956 – ADVANCED COORDINATION CHEMISTRY

 

 

Date : 20-04-2012             Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

Part-A

Answer all questions. Each question carries 2 marks

  1. What is dendritic catalysis? Cite two reactions catalyzed by a dendritic catalyst.
  2. Define relaxivity. Cite two FDA approved contrat agents for MRI.
  3. How do you compute the field strength of low-spin octahedral complex of cobalt(III)?
  4. Mention the different kinds of supramolecular interactions.
  5. What is supramolecularself assembly? Cite an example.
  6. How do you evaluate diffusion controlled process by cyclic voltammetry?
  7. Octahedral complexes of high-spind5 metal ions are feebly colored whereas octahedral complexes of low-spin d5 metal ions are intensely colored. Rationalize.
  8. Encapsulated lanthanide complexes emit with high intensity. Comment.
  9. Illustrate transmetalation reaction with an example.
  10. What is quantum up-conversion?

Part-B

Answer eight questions:   Each question carries 5 marks

  1. p-Back bonding by ligands increases the magnitudes of 10Dq values. Explain with a qualitative MO energy level diagram.
  2. Explain the method of constructing rotaxanes and pseudorotaxanes with examples.
  3. What are catenanes? Explain the methods of synthesizing catenanes.
  4. Illustrate a supramolecular assembly functioning like a molecular gear.
  5. Explain the construction of two photochemical supramolecular assemblies.
  6. Illustrate the importance of cation-cavity best fit in the synthesis of Schiff base macrocycles.
  7. Explain the electronic spectral features of tetragonally distorted low-spin octahedral cobalt(III) complexes.
  8. Explain the working principle of dye-sensitized photovoltaic cells.
  9. Explain the biological roles and structural features of rubredoxins and ferredoxins.
  10. Give an account of the photochemistry of lanthanide macrocyclic complexes. How do the photochemistry of lanthanides differ from that of ruthenium(II)?
  11. Write a note on spectroelectrochemistry.
  12. Write a note on the applications of dendrimers and metallodendrimers.

Part-C

Answer four questions. Each question carries 10 marks

  1. A six-coordinate low-spin cobalt(III) complex of a quadridentate ligand with two thiocyanate ions exhibits electronic transitions at 660, 525, 415, and 290 nm. Assign these transitions, predict the geometry, and compute the field strength of the axial and equatorial ligands.

24a. The epr spectrum of a high-spin manganese(II) complex doped into a diamagnetic host consists of 30 lines (five sets of six lines each).      Interpret the spectrum with the appropriate energy level diagram.                                                                                             (7)

  1. Mention the causes of zero field splitting in transition metal complexes.                       (3)

25a. Explain the principle of cyclic voltammetry and the method of evaluating the reversibility of a redox couple. Mention the causes of electrochemical irreversibility of a redox couple.

  1. The cyclic voltammogram of a pseudooctahedral cobalt(III) complex consists of two reduction waves at -0.34 and -1.22 V and two oxidation waves at -1.16 and -0.29 V versus Ag/Ag+. Explain the electrochemical behavior of this complex.

26a. Differentiate thermodynamic and kinetic coordination template effects.                      (3)

  1.   Explain the template synthesis of macrocyclic and compartmental macrocyclic ligands and their mono- and dinuclear complexes by coordination template effect.                            (7)
  2. What are molecular shuttles? Explain their synthesis by chemical, electrochemical, and photochemical methods.

28a. Explain the mechanism of water proton relaxation by gadolinium(III)-based contrast enhancing agents for MRI.

  1. Explain the synthetic strategies employed for the polyazacarboxylate ligands used for the development of contrast agents for MRI and diagnostic radiopharmaceuticals.

 

 

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Loyola College M.Sc. Chemistry Nov 2012 Quantum Chemistry & Group Theory Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

FIRST SEMESTER – NOVEMBER 2012

CH 1814 – QUANTUM CHEMISTRY & GROUP THEORY

 

 

Date : 07/11/2012            Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

Part–A

Answer ALL questions:                                                                                                      (10 x 2 = 20)

  1. State the order and degree of theSchrödinger equation for a particle in a one dimensional box.
  2. Normalize exp(ikx) for 0 ≤ x ≤ π
  3. Evaluate pxx2.
  4. Define moment of inertia.
  5. Identify the perturbation term in the Hamiltonian of Helium atom.
  6. Write down the Laugerre polynomial for 1S electron.
  7. What are variational integral and variational parameters?
  8. Prove that the operation S105 is equivalent to S63.
  9. Identify the point group of m-dichloro benzene.
  10. Mention the condition for an improper axis and its inverse to form a class together.

Part-B

Answer any EIGHT questions:                                                                                          (8 x 5 = 40)

  1. Derive the expression for linear momentum operator.
  2. Calculate the highest translational quantum number for an oxygen molecule in 1mm length to have its thermal energy kT at 298K(k = 1.38 x 10-23Jmolecule-1).
  3. Calculate the wave length of π →π* transition in 1, 3, 5-hexatriene
  4. Define the following
  • Associated Legendre equation
  • Associated Legendre polynomials
  • Legendre polynomials
  1. The internuclear distance of the 1H35Cl molecule is 0.128 nm. Calculate the spacing of the lines in its rotational spectrum in terms of cm-1.
  2. Obtain all the possible term symbols for a 4F state.
  3. Prove the commutation relation [p2x, x] = -2iћp.
  4. Illustrate the Pauli Exclusion Principle for the ground state of He atom.
  5. At what distance from the nucleus is the probability of finding the electron a maximum for a 1S electron in hydrogen?
  6. While the order is the same for both C3v and C3h point groups, their classes are different – reason out.
  7. Allene belongs to D2d point group. Identify the order and hence the number and dimensionality of the irreducible representations.
  8. Set up the secular determinant for allyl radical and obtain its energy levels.

Part-C

Answer any FOUR questions:                                                                                          (4 x 10 = 40)

  1. (a) Define the following:
  • Closed interval
  • Even function
  • Orthonormal set of functions.
  • Get the following polynomial functions for a rigid rotor:

(i) P00(cosθ)                        (ii) P10(cosθ)

  1. Calculate the wave length of π →π* transitionof the following molecule:

 

 

(Bond distances: C-C, 0.154 nm; C=C, 0.133 nm)

  1. Set up the Schrodinger equation for a rigid rotor and hence solve for its energy and wave functions.
  2. State the principle of Perturbation theory and use first order perturbation theory to calculate the energy of a particle in a one dimensional box from x = 0 to x = a with a slanted bottom, such that Vx = V0 (x)/a.    Given the wave function   Ψ(0) = (2/a)1/2 sin (nπx/a).
  3. a)Solve the polar angle dependent equation for Hydrogen atom.
  4. b) Highlight the important approximations that distinguish the HMO method from other LCAO methods.

 

 

 

 

  1. Work out the hybridization scheme for σ bonding by carbon in CH4 molecule of Td point group symmetry, using the character table given below.
Td E 8C3 3C2 6S4 6σd

A1 1 1 1 1 1 x2+y2+z2
A2 1 1 1 -1 -1
E 2 -1 2 0 0 (2z2-x2-y2, x2-y2)
T1 3 0 -1 1 -1 (Rx, Ry, Rz)
T2 3 0 -1 -1 1 (x, y, z) (xy, xz, yz)

 

 

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Loyola College M.Sc. Chemistry Nov 2012 Photochemistry & Organic Synthesis Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

THIRD SEMESTER – NOVEMBER 2012

CH 3808 – PHOTOCHEMISTRY AND ORGANIC SYNTHESIS

 

 

Date : 01/11/2012            Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

Part-A

Answer ALL questions:                                                                                                         (10 ´ 2 = 20)

  1. How is diborane specific in its reactivity towards substituted alkenes?
  2. Draw the FMO picture of the excited state HOMO of 1,3,5-hexatriene.
  3. What are regioselective reactions? Give an example.
  4. What are the products formed when ethyl bromide is reduced electrochemically on platinum electrode?
  5. Predict the stereochemistry of the product.
  6. What is Fries photochemical rearrangement? Write the mechanism of the reaction.
  7. What are the synthons prepared from the following synthetic equivalents?
  8. a) 2-bromobutane b) acetyl chloride
  9. What is the geometry of excited state ethylene molecule? Give reasons.
  10. What are group transfer reactions? Give examples.
  11. What is oxy-Cope rearrangement reaction? Give an example.

 

Part-B

Answer any EIGHT questions:                                                                                              (8 ´ 5 = 40)

  1. Why Wittig Horner reaction is preferred to Wittig reaction? Mention the advantages of the Wittig Horner reaction with an example.
  2. Explain the synthesis of following difunctionalised compounds.
  3. a) 1,3-propanediamine b) ethyl acetoacetate
  4. How are protection, activation and attachment of bridging group done repeatedly in the synthesis of a polypeptide?
  5. Explain the mechanism of following reactions.
  6. a) oxidation of an 2-butene by KMnO4 in basic medium.
  7. b) Wolff Kishner reduction of acetophenone
  8. Write the complete mechanism of electroreduction of nitrobenzene.
  9. Perform retrosynthetic analysis and suggest a suitable synthetic method of the following. (3 + 2)

 

  1. Draw correlation diagram for the electrocyclization of 1,3-butadiene by con rotation. Predict whether the reaction is thermally or photochemically allowed.
  2. If hydrazobenzene in acid medium undergoes (3,3)- and (3,5)-sigmatropic rearrangements, what are the products formed? Explain the mechanism of the reaction.

 

  1. Explain the mechanism of the following reaction and predict the stereochemistry of the mentioned H atoms in the product.
  2. What is Barton reaction? How does it take place in steroids? Explain with an example.
  3. How does 4,4-diphenylcyclohex-2-en-1-one undergo Zimmerman rearrangement to form various photochemical products?
  4. Explain the Norrish type-I and type-II reactions with an example each.

 

Part-C

Answer any FOUR questions:                                                                                               (4 ´ 10 = 40)

  1. a) Write the stereochemical importance of Stobbe reaction. (2)
  2. b) Explain 1,2- and 1,4-Michael addition reactions. (5)
  3. c) How unnatural synthons are used to prepare 1,2-difunctionalised compounds? Explain with an example. (3)
  4. a) How are C-C disconnections done? Explain any four guidelines. (6)
  5. b) Perform retrosynthetic analysis and suggest a suitable synthetic route to the following compound (4)
  6. a) Explain protection and deprotection of an amine. (4)
  7. b) Explain the mechanism of the following reactions with examples. (3+3)
  8. i) NaBH4 reduction of an imine ii) Peracid oxidation
  9. a) Explain the synthesis of cubane. .           (5)
  10. b) How mercuric acetate acts as a dehydrogenating agent? Explain with any two examples.                                                                                                    (5)
  11. a) Predict a suitable mechanism for the following thermal reaction.            (4)
  12. b) Discuss the FMO interactions in the 1,3-, and 1,5-sigmatropic rearrangement reactions. How is the stereochemistry altered in the product? (6)
  13. a) Explain photoisomerisation reaction of stilbene. How is the process controlled by photosensitizers?                                                                            (6)
  14. b) Explain the di-p-methane rearrangement reaction with an example. (4)

 

 

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Loyola College M.Sc. Chemistry Nov 2012 Organic Reaction Mechanism & Stereochemistry Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

FIRST SEMESTER – NOVEMBER 2012

CH 1812 / 1806 – ORGANIC REACTION MECHANISM & STEREOCHEMISTRY

 

 

Date : 01/11/2012            Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

PART – A

Answer ALL questions:                                                                                (10 x 2 = 20)

 

  1. Write the mechanism of Chichibabin reaction.
  2. What is primary kinetic isotope effect? Explain with suitable example.
  3. “Diazotization of aniline follows second order with respect to nitrous acid” Propose a mechanism for this reaction.
  4. What is para-Claisen rearrangement? Explain with mechanism.
  5. How does indole prepared from phenyl hydrazine?
  6. What is Birch reduction?
  7. What happens when cyclohexene on ozonolysis?
  8. In α, α’-dimethylsuccinic acid, the meso form predominates at equilibrium over the racemic form. Why?
  9. State and explain Cram’s rule with suitable example.
  10. What is atropisomerism? Give example.

 

PART-B

Answer ANY EIGHT questions:                                                                   (8 x5 = 40)

 

  1. Draw the potential energy diagram of thermodynamic and kinetically controlled product formation of a reaction between 1,3-butadiene and HBr.Explain.
  2. Explain the microscopic reversibility with suitable example.
  3. Explain the following;
  4. a) trapping of intermediate      b) isotope labeling study
  5. Explain the mechanism of abnormal Claisen rearrangement.
  6. How would you convert 1,7,7’-trimethyl bicycle[2,2,11-4]heptan-2-ol into 2,2’-dimethyl-3-methylidene bicycle [2,2,11-4]heptane?
  7. When treated with p-CH3C6H5SO2Cl in pyridine, the α-benzilmonoximes undergo Beckmann rearrangement with fragmentation. Explain.
  8. Explain any one application for each of the following reagents.
  9. a) SeO2 b) OsO4
  10. How does a carboxylic acid undergoes oxidative decarboxylation? Explain.
  11. Explain mutarotation with any one example.
  12. Give an example for a first order asymmetric transformation reaction and explain.

 

  1. Predict the stereochemical change of acetolysis of 3-methoxy-2-bromobutane in the presence of silver acetate in acetic acid.
  2. State Brett’s rule and explain the reactivity of bicyclic rings.

 

PART-C

Answer ANY  FOUR questions:                                                                  (4 x10 = 40)

 

  1. a) “Radical bromination of isopentane is more selective than chlorination.” Explain with potential energy diagram.
  2. b) How does a Raman spectroscopy is used to determine the mechanism of nitration of benzene? Explain.
  3. a) Determine the reaction mechanism of base-catalysed iodination of  aniline in presence of excess of iodide ion from its experimental rate data.
  4. b) Predict the products to be expected from acid-catalyzed rearrangement of cis- and trans-1,2-dimethylcyclohexane-1,2-diol and sketch mechanism for the formation.
  5. a) “The lactones obtained by the Baeyer-Villiger oxidation of camphor and apocamphor contain 25% and 94% of the abnormal product” Why?
  6. b) Explain memory effect with suitable example.

 

  1. a) Give mechanism for the following conversions.

(i) Methane into methanol using aq.CrO3

(ii)Acetaldehyde into acetic acid using O2 and Ag.

  1. b) Complete the following with mechanism.

 

  1. a) What are the various products obtained on the acetolysis of 3-phenyl-2-pentyl tosylate?
  2. b) Explain the process of separation of racemic alcohols with an example.
  3. c) Asssign R,S configurations to the following:

 

  1. a) State and explain curtin-Hammett principle with suitable example.
  2. b) Explain the following with  applications; (i) cotton effect  (ii) axial haloketone rule.

 

 

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Loyola College M.Sc. Chemistry Nov 2012 Molecular Spectroscopy Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

THIRD SEMESTER – NOVEMBER 2012

CH 3810 – MOLECULAR SPECTROSCOPY

 

 

Date : 06/11/2012            Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART A

Answer all the questions:                                                                                                        10×2=20

  1. How are absorption and emission spectra formed?
  2. Define S/N ratio.
  3. Mention the differences between Rayleigh and Raman Scattering.
  4. State Frank Condon principle.
  5. How many normal modes of vibration are possible for HBr and SO2(bent) ?
  6. Determine the magnetic field strength of an NMR instrument in which a proton chemical shift of 2.2ppm corresponds to a frequency of 1100Hz. Given gn = 5.585
  7. Sketch the 1H NMR of pure n-propanol.
  8. Obtain the ‘g’ value for Mn2+
  9. Which of the following gives NQR? Chlorine liquid or Chlorine solid. Justify your choice.
  10. When can a system exhibit quadrupole splitting?

PART B

Answer any eight questions:                                                                                                  8×5=40

 

  1. What are the factors that affect the width of the spectral lines? Explain.
  2. Explain the following for the linear and nonlinear polyatomic molecules.
  3. a) fundamental vibrations       b) overtones and combination frequencies
  4. Briefly explain the principle of diatomic vibrating rotor when DJ = +1 and -1.
  5. Discuss the different regions of the electromagnetic radiation.
  6. Explain the fingerprint and absorption frequencies of functional groups for organic compounds in IR region?
  7. Describe the effect of isotopic substitution in rotational spectra.
  8. What are short range and long couplings? Give an example each.
  9. Arrive at the structures of H3PO3 and H3PO2 whose 31P NMR show a doublet and a triplet respectively, when chemical exchange operates.

 

 

  1. Explain isotropic and anisotropic hyperfine splitting with examples.
  2. While isomershift is a function of S electron density, quadrupole splitting is not so – Explain.
  3. What is pure NQR? Is pure NQR enough to calculate the quadrupole parameters in the case of 14N containing compound?
  4. Sketch the EPR spectrum of i) H2+ ii) D2+

PART C

Answer any four questions:                                                                                                   4×10=40

  1. Draw and explain Morse curve for an anharmonic oscillator.
  2. Assume the following data for the molecule 1H35Cl:

Bond length:127.5pm, Bond force constant : 516.3Nm-1,

Atomic masses: 1H = 1.673×10-27kg, 35Cl = 58.06 x10-27kg

Calculate the following and give answers in cm-1

  1. Zero point energy and the energy of fundamental vibration
  2. Rotational constant B
  3. Wave numbers of the lines P(1), P(2), P(3), R(0), R(1), R(2)
  4. Discuss the principle of diatomic non-rigid rotor with an example.
  5. a) The NQR frequencies for 2D in a compound are γ+ = 6 kHz and γ– = 5 kHz respectively. Calculate the asymmetry parameter η and the quadrupole coupling constant.
  6.  b) Explain the principle of FAB mass spectrometry.
  7. a) Acetylenic protons are more shielded than ethylenic protons. – Justify.
  8. b) What is COSY? Discuss the COSY of 1,3-dichloro propane.
  9. a)How will you determine the oxidation state of an element using Mossbauer spectroscopy?
  10. b) What is ‘g’ shift in EPR? How does it help to know the delocalization of

electron in a molecule?

 

 

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Loyola College M.Sc. Chemistry Nov 2012 Material Science Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

SECOND SEMESTER – NOVEMBER 2012

CH 2901 – INSTRUMENTAL METHODS OF CHEMICAL ANALYSIS

 

 

Date : 06/11/2012            Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

PART A

Answer all the questions:                                                                   10×2=20 Marks

 

  1. Define molarity.
  2. State Beer Lambert’s law.
  3. Calculate the pH of 0.01N NaOH.
  4. What is Buffer solution? Give an example.
  5. Mention the principle of HPLC.
  6. State Bragg’s law.
  7. Give an example for Mc-Lafferty rearrangement.
  8. Mention the significance of finger print region in IR spectroscopy.
  9. Define gyroscopic motion.
  10. How many ml of conc.HCl (density = 1.18 g/ml, 36.0 wt% HCl, MW = 36.5) should be diluted to 1litre to produce a 0.100 M solution?

 

PART B

Answer any eight questions:                                                                        8×5=40 Marks

 

  1. What are the requirements of a primary standard?
  2. How is sulphate determined by turbidometry?
  3. Discuss the significance of PMT.
  4. Explain the analysis of riboflavin by spectroflurometry.
  5. Write a short note on circular dichroism with an example.
  6. How is ion selective electrode helpful in the analysis of fluoride in drinking water?
  7. Draw and explain the working principle of a thermal conductivity detector.
  8. Briefly explain the instrumentation of EPR.
  9. Explain the fragmentation pattern of decane.
  10. Discuss the absorption bands of functional groups in IR spectrum.
  11. Explain the method of single crystal XRD determination.
  12. Write short notes on detectors used in HPLC.

 

 

PART C

Answer any four questions:                                                                4×10=40 Marks

 

  1. Draw and explain the working principle of dark beam spectrophotometer.
  2. Briefly discuss the instrumentation of AAS.
  3. a) Explain the instrumentation of turbidometry.
  4. b) How is phosphate determined by turbidometry.
  5. Draw the block diagram and explain the instrumentation of GC.
  6. Explain the fragmentation pattern of
  7. a) benzyl alcohol
  8. b) pentanoic acid
  9. Briefly explain the instrumentation of NMR with a block diagram.

 

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Loyola College M.Sc. Chemistry Nov 2012 Coordination Chemistry Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

THIRD SEMESTER – NOVEMBER 2012

CH 3809 – COORDINATION CHEMISTRY

 

 

Date : 03/11/2012            Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

Part – A

Answer all the questions:                                                                                                           (10 x 2 = 20)

 

  1. Calculate the spin only magnetic moment of d4, high and low spin octahedral system.
  2. Why does metal with d8configuration readily form square planar complexes?
  3. Is MnCr2O4 likely to have a normal or inverse spinel structure?
  4. What is the electronic configuration of [Mn(NCS)6]4- if the magnetic moment of complex is 6.06 Bohr magneton.
  5. Why is the stretching frequency of C—O high for terminal carbonyls compared to bridging metal carbonyls?
  6. Why does electronic spectra of [Ni(en)3]2+ show three absorption bands?
  7. Why the electron transfer reaction is slow between the complexes of [Fe(CN)6]4- and [Co(NH3)6]3+?
  8. What is Nephelauxetic effect?
  9. What is Wilkinson catalyst? Which type of reaction is easily activated by this catalyst?
  10. What are the main functions of chlorophyll in photosynthesis?

Part – B

Answer any eight questions:                                                                                                     (8 x 5  = 40)

 

  1. Explain the d orbital splitting of octahedral complexes using crystal field theory.
  2. Write a brief note on static and dynamic JahnTeller effect.
  3. What are the evidences supporting Crystal field theory? Explain with examples.
  4. Which dn configurations show quenching of orbital angular momentum if it forms octahedral, high and low spin complexes?
  5. Derive the ground term of d4 and d5.
  6. Discuss the associative and dissociative mechanisms of substitution reactions in metal complexes.
  7. Describe the mechanistic pathway of hydroformylation of alkene using catalyst.
  8. How is optical rotatory dispersion study useful to determine the absolute configuration of chiral complexes?
  9. What is trans effect? How is this effect helpful in synthesizing steroisomers?
  10. What are supramolecular assemblies? Describe any one method to assemble such a system.
  11. Explain photoaquation and photoisomerisation reactions with examples.
  12. Briefly explain the role of metal ion in the hydrolytic breakdown of protein by carboxy peptidase.

 

 

.

 

Part – C

Answer any four questions:                                                                                                        (4 x 10 = 40)

 

  1. Explain with the help of MOT why Cl– acts as a weak ligand whereas

CN– acts as a strong ligand in octahedral transition metal complexes.

  1. How is Orgel diagram helpful in explaining the electronic spectrum of d1-9, high spin octahedral and tetrahedral complexes.
  2. Discuss in detail the mechanisms of outer and inner sphere electron transfer in metal
  3. a) Explain the synergic effect of metal-ligand bonding in metal carbonyls.
  4. b) Explain the variations in the stretching frequency of the isoelectronic species, Cr(CO)6, [V(CO)6]– and [Mn(CO)6]+.
  5. Discuss the bonding in ferrocene on the basis of molecular orbital energy level diagram.
  6. Discuss the essential structure of haemoglobin and explain its cooperativity in its oxygenation.

 

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Loyola College M.Sc. Chemistry Nov 2012 Instrumental Methods Of Chemical Analysis Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

SECOND SEMESTER – NOVEMBER 2012

CH 2901 – INSTRUMENTAL METHODS OF CHEMICAL ANALYSIS

 

 

Date : 06/11/2012            Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

PART A

Answer all the questions:                                                                   10×2=20 Marks

 

  1. Define molarity.
  2. State Beer Lambert’s law.
  3. Calculate the pH of 0.01N NaOH.
  4. What is Buffer solution? Give an example.
  5. Mention the principle of HPLC.
  6. State Bragg’s law.
  7. Give an example for Mc-Lafferty rearrangement.
  8. Mention the significance of finger print region in IR spectroscopy.
  9. Define gyroscopic motion.
  10. How many ml of conc.HCl (density = 1.18 g/ml, 36.0 wt% HCl, MW = 36.5) should be diluted to 1litre to produce a 0.100 M solution?

 

PART B

Answer any eight questions:                                                                        8×5=40 Marks

 

  1. What are the requirements of a primary standard?
  2. How is sulphate determined by turbidometry?
  3. Discuss the significance of PMT.
  4. Explain the analysis of riboflavin by spectroflurometry.
  5. Write a short note on circular dichroism with an example.
  6. How is ion selective electrode helpful in the analysis of fluoride in drinking water?
  7. Draw and explain the working principle of a thermal conductivity detector.
  8. Briefly explain the instrumentation of EPR.
  9. Explain the fragmentation pattern of decane.
  10. Discuss the absorption bands of functional groups in IR spectrum.
  11. Explain the method of single crystal XRD determination.
  12. Write short notes on detectors used in HPLC.

 

 

PART C

Answer any four questions:                                                                4×10=40 Marks

 

  1. Draw and explain the working principle of dark beam spectrophotometer.
  2. Briefly discuss the instrumentation of AAS.
  3. a) Explain the instrumentation of turbidometry.
  4. b) How is phosphate determined by turbidometry.
  5. Draw the block diagram and explain the instrumentation of GC.
  6. Explain the fragmentation pattern of
  7. a) benzyl alcohol
  8. b) pentanoic acid
  9. Briefly explain the instrumentation of NMR with a block diagram.

 

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Loyola College M.Sc. Chemistry Nov 2012 Concepts In Inorganic Chemistry Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

FIRST SEMESTER – NOVEMBER 2012

CH 1813/1807 – CONCEPTS IN INORGANIC CHEMISTRY

 

 

Date : 05/11/2012            Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

Part-A

Answer all questions. Each question carries two marks:                                                           10×2=20

 

  1. For two ions of the same size and charge one with an (n-1)dxns0electronic configuration will be more polarizing than a cation with a noble gas configuration (n-1)s2(n-1)p6ns0. Illustrate with an example.
  2. Illustrate isolabel relationship with an example and mention its significance.
  3. What are thermochemical radii? How are they calculated?
  4. What is Madelung constant? How is it calculated for the rock salt structure?
  5. Both Cu(I) and Cu(II) are stable, whereas Ca(I) is unstable and is readily oxidized to Ca(II). Explain.
  6. KI with a small enthalpy of hydration (-611 kJ mol-1) is soluble in water, but CaF2with a large enthalpy of hydration (-6782 kJ mol-1) is insoluble in water. Offer a resonable explanation.
  7. Both trigonalbipyramidal and square pyramidal geometries involve dsp3 hybridization: what is the difference between these two?
  8. What are ionic liquids? How are they classified?
  9. What are superacids? Cite an example.
  10. Illustrate leveling effect with an example.

 

Part-B

Answer any eight questions. Each question carries five marks:                                                     8×5=40

 

  1. Derive Born-Lande equation to compute lattice energy. How is a more accurate measure of lattice energy obtained?
  2. Explain the polarity of covalent bond between two hetero atoms in the light of MO theory with the aid of MO energy level diagram.
  3. In molecules where variable hybridization is possible, different bond lengths are possible. Illustrate with an example.
  4. Give an account of the general structural features of ionic compoundswith unitcell diagrams.

15a.  What is critical radius ratio? Mention its significance.

  1. Calculate the size of the octahedral hole in a lattice of closest packed anions.
  2. What is the principle of conservation of atomicorbitals? Account for the electronegativity difference between atoms in a molecule with the aid of qualitative MO energy level diagram.
  3. Explain the influence of bond pair and lone pair electrons in determining the structures of SF4 and NH3.
  4. Give an account of imperfection in crystal lattices.
  5. What are proton sponges? How do they affect basicity?
  6. Discuss the solvolysis and precipitation reactions in liquid ammonia.
  7. Give an account of the unique properties of sulfuric acid as a solvent.
  8. Explain (a) apicophilicityand (b) symbiosis with examples.

 

Part-C

Answer any four questions. Each question carries ten  marks.                                                  4×10=40   

 

23a.  Schematically represent s– and p-molecular orbitals formed by the overlap of p-orbitals.

  1. The ionization energy of NO is 894 kJ mol-1and the nitrosyl ion (NO+) is stabilized and exists in several compounds. Explain with the help of a qualitative MO energy level diagram.
  2. How does the MO energy level diagram of NO differ from that of BeH2?

 

24a.  What are electron density counter diagrams? How is the effect of polarization illustrated with theaid of such diagrams?

  1. How does hybridization affect electronegativity of atoms in molecules? Illustrate with an example.

 

25a.  Explain the Band theory of metals and account for the metallic properties.

  1. How do you account for covalent character of ionic compounds? Cite experimental evidences to illustrate such a property of ionic compounds.

 

26a.  What are inclusion compounds? How are they classified?

  1. Explain the structural features of gas hydrates and describe their applications.

 

27a.  Explain HSAB principle? Mention the factors which influence the hardness of a chemical species.

  1. Write a note on the donor acceptor number of solvents.

 

28a.  Describe Lux-Flood and Usauovich concepts of acids and bases.

  1. Discuss the classification of acids and bases.

 

 

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Loyola College M.Sc. Chemistry Nov 2012 Chemical Kinetics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – CHEMISTRY

THIRD SEMESTER – NOVEMBER 2012

CH 3812 / 4807 – CHEMICAL KINETICS

 

 

Date : 08/11/2012            Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

Part A

Answer ALL the questions.                                                     (10 x 2 = 20 Marks)

  1. In the reaction 2NO + 2H2à N2 + 2H2O, mixture of reactant gases at an initial pressure of 336 mm of Hg, was half changed in 108 sec and when the initial pressure was 288 mm of Hg, it was half changed in 147 sec. Determine the order of reaction.
  2. Show that the energy of activation according to the collision theory is less than the energy of activation given by Arrhenius theory.
  3. If the rate constant at high pressure for the isomerization of cyclopropane is 1.2 x 10-4 s-1 and that at low pressure is 5.14 x 10-6 torr-1 s-1, below what pressure will the isomerization be for all practical purposes a second order reaction?
  4. Explain electrostriction.
  5. Addition of acetonitrile in an atmosphere of N2, has no effect on the oxidation of thioacids by benzyl trimethyl ammonium chlorobromate. What is your inference regarding the mechanism of this reaction?
  6. What is meant by turn over number? What is its significance?
  7. The observed activation energy for the gas phase recombination of iodine atoms in the presence of argon is negative. Explain.
  8. Draw the concentration-time profile for the consecutive reaction, A à B à C, with proper labeling.
  9. What is Hammett acidity function?
  10. In water the fluorescence quantum yield and the observed fluorescence life time of tryptophan are 0.2 and 2.6 ns respectively. Calculate the fluorescence rate constant.

PART – B

Answer ANY EIGHT questions                                               (8 x 5 = 40 Marks)

  1. Explain Guggenheim’s method for first order reactions
  2. Hydrogen iodide gas has a viscosity of 39.66 x 10-5 poise at 560 K and 101.3 kPapressure. Calculate the collision diameter of hydrogen iodide molecule.
  3. Explain the need for activation energy based on potential energy surfaces. Illustrate your answer by taking the following reaction as example:

Ha+  Hb  – Hg    -à  Ha  –  Hb  + Hg

  1. The pre-exponential term for a unimolecular gas reaction occurring at 2000C is 2.75 x 1015 s-1. Calculate the entropy of activation.  How does the result depend upon the standard state used?
  2. Using double sphere model explain the effect of dielectric constant of the medium on the rate of the reaction between ions in solutions.
  3. The pKa for the dissociation of phenol in water at 250C is 9.85. The r value for the dissociation H2O + X-C6H4OH à X-C6H4O– + H3O+ is 2.00. The s–p values of –NO2  and – COOH are + 1.27 and + 0.73 respectively and the s+p values of – CH3 and – Cl– are –0.31 and + 0.11 respectively. Arrange the substituted phenols in the order of increasing acid strength.
  4. What are Skrabalplots?Explain.
  5. The rate of the reaction HA + H2O   H3O+ + A– is studied using T-jump method.  Calculate the expected relaxation time if a 0.1 M solution has a pH of 4 and k-1 is 1010 M-1 s-1.
  6. The rate law for the reaction between 2- bromo butane and OH-1 in 75% ethanol (aq) at 300C is given by rate = 3.2 x 10-5 [RBr][OH-1] + 1.5 x 10-6 [RBr].  What percentage of reaction will take place by an SN2 path way if a) [OH-1] = 1 M b) [OH-1] = 10-3
  7. Discuss the salient features of the kinetics of H2-Br2 chain reaction (No derivation is needed).
  8. Explain the kinetic scheme for a bimolecular quenching process and hence derive Stern-Volmer equation.
  9. How are kinetic parameters evaluated for a single substrate enzymatic reaction?

PART – C

Answer ANY FOUR questions                                                (4 x 10 = 40 Marks)

  1. a) The isotope  90Sr emits β–-radiation and has a half life of 28 years.  If 2 micro gram of90Sr is absorbed by a newly born child, how much of it is left behind after (a) 18 years (b) 70 years. (5)
  2. b) Derive the expression for the number of collisions between two different gas molecules A and B.(5)
  3. a) The rate constant k for the reaction between persulphate ions and iodide ions in aqueous solution at 250C varies with ionic strength (as follows.  Estimate ZAZB.

x 10-3/ mol dm-3                              2.45                        4.45                        8.45

k/ 10-4 dm3 mol-1 s-1                 1.05                 1.16                 1.26                 (6)

  1. b) How are the reactions classified on the basis of the volume of activation? (4)
  2. a) Explain how the catalytic constants for a reaction catalyzed by both general acid and general base are evaluated. (6)
  3. b) Show that Bronsted catalytic law is a form of LFER.                                                   (4
  4. Explain any two of the following: (5+5)a) Kinetics of H2-O2 explosive reaction b) van’t Hoff type and Arrhenius type intermediates.
  5. c) Surface area measurement using BET equation d) Kinetics of reversible reactions
  6. a) Discuss the Rideal-Eley mechanism for a bimolecular surface reaction with a specific example. (6)

b) The decomposition of O3, 2O3à 3 O2 is observed to obey the rate law – d[O3]/dt = 2 k [O3]2/[O2], suggest a suitable mechanism and explain.                                                            (4)

  1. For the oxidation of hexacyano ferrate (II) by peroxodisulphate in aqueous perchloric acid medium, the following data were obtained: (i) Plots of log [Fe(CN)64-] vs time were linear at constant ionic strength and [H+] (ii) The pseudo first order rare constants (kobs) vary linearly with peroxodisulphate concentration at constant ionic strength and [H+]  (iii) At constant [Fe(CN)64-] [S2O82-] and ionic strength, increasing [perchloric acid] increased the rate.  Plots of [S2O82-] /kobsvs 1/[H+] were linear (iv)  Increasing the ionic strength of the medium, increased the rate (v)  ΔS# is negative.  Explain the data.                                                                                   (5)

Propose a suitable mechanism to account for the above data and write the rate expression.    (5)

 

 

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M.Sc. Chemistry (Final) Drugs and Pharmaceuticals Sample Paper 1 (English & Hindi)

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Drugs and Pharmaceuticals

Max Marks: 20

Note: The Internal Assignment has been divided into three sections A, B, and C. Write Answer as per the given instruction.

आतंरिक मूल्यांकन हेतु प्रश्न पत्र ‘A’,’B’ और ‘C’ तीन खण्डों में विभाजित है| प्रत्येक खण्ड के निर्देशानुसार प्रश्नों का उत्तर दीजिए|

 

Section-A

(Very Short Answer Type Questions) अति लघु ऊत्तर वाले प्रश्न (अनिवार्य)

Note: Answer all questions. As per the nature of the question you delimit your answer in one word, one sentence or maximum up to 30 words. Each question carries 1 mark. 4×1=04

नोट: सभी प्रश्नों का उत्तर दीजिए| आप अपने उत्तर को प्रश्नानुसार एक शब्द , एक वाक्य या अधिकतम 30 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 1 अंक का है| 4×1=04

1. Define the traceless linker.

अवशेषरहित लिंकर को परिभाषित कीजिये ।

2. Example one neuro transmitter.

एक न्यूरो ट्रांस्मिटर का उदाहरण दीजिए ।

3. Name the Sodium channel activators.

सोडियम चैनल प्रवर्तको के नाम लिखये।

4. Name of the anticancer drugs.

एंटी-कैंसर ड्रगो के  नाम बताइए ।

 

Section-B

(Short Answer Questions) लघु उत्तर वाले प्रश्न

Note: Answer any 2 questions. Each answer should not exceed 200 words. Each question carries 4 marks.

नोट: निम्नलिखित में से किन्हीं 02 प्रश्नों के उत्तर दीजिए| आप अपने उत्तर को अधिकतम 200 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 4 अंकों का है| 2×4=08

1. Discuss the historical development of anti metabolites.

उपापचय के ऐतिहाहिक विकास की चर्चा करो ।

2. Describe the clinical trials under different phase studies.

रोगविषयक जाचं के विभिन्न चरणों के अध्ययन की व्याख्या करो ।

3. What are the H2 receptors antagonists? Give two examples with their structures.

H2 संग्रहक् विरोधी ड्रग क्या है किन्ही दो उदाहरणों द्वारा सचित्र समझाइए ।

4. Write down the QSAR steps involved in quantitative structural activity.

मात्रात्मक संरचना सक्रियता में शामिल QSAR पदों को लिखिए ।

 

Section ‘C’

(Long Answer Questions) (दीर्घ उत्तर वाले  प्रश्न)

Note: Answer any one question. You have to delimit your each answer maximum up to 800 words. Each question carries 08 marks.

नोट : निम्नलिखित में से किसी 01 प्रश्न का उत्तर दीजिए|आपको  अपने प्रत्येक उत्तर को अधिकतम 800 शब्दों में परिसीमित करना है| प्रत्येक प्रश्न 08 अंकों का है | 1×8=08

1. Discuss the application of the partition coefficient in predicting the hydrophobic character of the drug.

ड्रग के जलरोधी गुण पर विभाजन स्थिरांक के प्रभाव के बारे में बतलाओ |

2. State the importance of the Radioactive isotopes in drug analysis

रेडियोधर्मी आइसोटोप्स की ड्रग विश्लेषण में उपयोगिता बतलाइए |

M.Sc. Chemistry (Final) Natural Products, Heterocycles, Biogenesis and Spectroscopy Sample Paper 1 (English & Hindi)

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Natural Products, Heterocycles, Biogenesis and Spectroscopy

Max Marks: 20

Note: The Internal Assignment has been divided into three sections A, B, and C. Write Answer as per the given instruction.

आतंरिक मूल्यांकन हेतु प्रश्न पत्र ‘A’,’B’ और ‘C’ तीन खण्डों में विभाजित है| प्रत्येक खण्ड के निर्देशानुसार प्रश्नों का उत्तर दीजिए|

 

Section-A

(Very Short Answer Type Questions) अति लघु ऊत्तर वाले प्रश्न (अनिवार्य)

Note: Answer all questions. As per the nature of the question you delimit your answer in one word, one sentence or maximum up to 30 words. Each question carries 1 mark. 4×1=04

नोट: सभी प्रश्नों का उत्तर दीजिए| आप अपने उत्तर को प्रश्नानुसार एक शब्द , एक वाक्य या अधिकतम 30 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 1 अंक का है| 4×1=04

1. मॉर्फीन एवं रिसर्रिपीन का अणु सूत्र लिखिए।

Write down molecular formula of Morphine & Reserpine.

2. Write down an example of Steroidal Hormone.

किसी एक स्टिरॉइड—हॉर्मोन का उदाहरण दीजिए।

3. Name the pathway used for Biosynthesis of Terpinoids?

टर्पिनॉइड के जैव-संश्लेषण में किस पथ का प्रयोग करते हैं?

4. Name any one medically important 1, 2, 4 triazole.

चिकित्सकीय रूप से उपयोगी किसी एक 1, 2, 4 ट्राइजोल का नाम दो।

 

Section-B

(Short Answer Questions) लघु उत्तर वाले प्रश्न

Note: Answer any 2 questions. Each answer should not exceed 200 words. Each question carries 4 marks.

नोट: निम्नलिखित में से किन्हीं 02 प्रश्नों के उत्तर दीजिए| आप अपने उत्तर को अधिकतम 200 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 4 अंकों का है| 2×4=08

1. How will you prove the position of -Methyl group in Cholestrol.

कॉलेस्टरॉल पर उपस्थित  -मिथाइल समूह की स्थिति का निर्धारण आप कैसे निश्चित करोगे?

2. Explain anyone model to understand Mechanism of enzyme action.

एंजाइम की क्रियाविधि को किसी एक मॉडल से समझाइए।

3. Give any one Method to synthesize Isoxazole.

आइसोक्जेजोल बनाने की एक विधि दीजिए।

4. Describe the synthesis of Adenine by Fischer.

फिशर द्वारा प्रदत्त एडेनिक के संश्लेषण को समझाइए।

 

Section ‘C’

(Long Answer Questions) (दीर्घ उत्तर वाले  प्रश्न)

Note: Answer any one question. You have to delimit your each answer maximum up to 800 words. Each question carries 08 marks.

नोट : निम्नलिखित में से किसी 01 प्रश्न का उत्तर दीजिए| आपको  अपने प्रत्येक उत्तर को अधिकतम 800 शब्दों में परिसीमित करना है| प्रत्येक प्रश्न 08 अंकों का है| 1×8=08

1. Explain the use of 13CNMR studies in the study of Reaction-Mechanism.

अभिक्रिया की क्रिया विधि के अध्यन में 13CNMR  स्पेट्रा के उपयोगों का वर्णन कीजिए।

2. What do you mean by chemical shift, given the calculation of chemical shifts for alkane.

रासायनिक विस्थापन से आप क्या समझते हैं? एल्केन के लिए रासायनिक विस्थापन की गणना करने की विधि बताइये।

M.Sc. Chemistry (Final) Reaction Mechanisms, Paricyclic Reactions, Organic Photochemistry, Stereochemistry Sample Paper 1 (English & Hindi)

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Reaction Mechanisms, Paricyclic Reactions, Organic Photochemistry, Stereochemistry

Max Marks: 20

Note: The Internal Assignment has been divided into three sections A, B, and C. Write Answer as per the given instruction.

आतंरिक मूल्यांकन हेतु प्रश्न पत्र ‘A’,’B’ और ‘C’ तीन खण्डों में विभाजित है| प्रत्येक खण्ड के निर्देशानुसार प्रश्नों का उत्तर दीजिए|

 

Section-A

(Very Short Answer Type Questions) अति लघु ऊत्तर वाले प्रश्न (अनिवार्य)

Note: Answer all questions. As per the nature of the question you delimit your answer in one word, one sentence or maximum up to 30 words. Each question carries 1 mark.

नोट: सभी प्रश्नों का उत्तर दीजिए| आप अपने उत्तर को प्रश्नानुसार एक शब्द , एक वाक्य या अधिकतम 30 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 1 अंक का है| 4×1=04

1. Stability order of following carbonium ions Benzylic, Allylic tertary, secondary?

निम्न कार्बोनियम आयन के स्थायित्व का क्रम होगा:

Benzylic, Allylic tertary, secondary

2. What is the Fluorescence?

Fluorescence  क्या है?

3. Which type of transition are involved in photo chemical reaction of compound?

प्रकाश रायायनिक अभिक्रिया यौगिकों में किस प्रकार का स्थानान्तरण सम्भव है?

4. What are sigmatropic shift?

Sigmatropic shift  क्या है?

 

Section-B

(Short Answer Questions) लघु उत्तर वाले प्रश्न

Note: Answer any 2 questions. Each answer should not exceed 200 words. Each question carries 4 marks.

नोट: निम्नलिखित में से किन्हीं 02 प्रश्नों के उत्तर दीजिए| आप अपने उत्तर को अधिकतम 200 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 4 अंकों का है| 2×4=08

1. Discuss the mechanism of Baeyer-villiger oxidation.

बेगर विलींगर आक्सीकरण अभिक्रिया को समझाइए।

2. Draw the of carbon-carbon double bond. Explain their symmetry properties.

कार्बन—कार्बन् द्विबन्ध के लिए -आण्विक कक्षक आरेख बनाइए तथा सममीती तत्वों का वर्णन् कीजिए।

3. Predict the reaction conditions for [1, 5] sigmatropic shfts of a H, by PMO method.

PMO सिद्धान्त की सहायता से 1,5—सिग्माट्रोपिक हाइड्रोजन शिफ्ट को समझाइए।

4. Explain that the state need not have same configuration as the

समझाइए कि  state  व   state के लिए same configuration नहीं होता।

 

Section ‘C’

(Long Answer Questions) (दीर्घ उत्तर वाले  प्रश्न)

Note: Answer any one question. You have to delimit your each answer maximum up to 800 words. Each question carries 08 marks.

नोट : निम्नलिखित में से किसी 01 प्रश्न का उत्तर दीजिए | आपको  अपने प्रत्येक उत्तर को अधिकतम 800 शब्दों में परिसीमित करना है| प्रत्येक प्रश्न 08 अंकों का है| 1×8=08

1. Define cycloaddition reactions? What are (m+n) cycloadditions?

Cycloaddition (योगात्मक) अभिक्रिया को परिभाषित कीजिए तथा (m+n)  योगात्मक अभिक्रिया क्या है? उपयोगी दो उदाहरण सहित समझाइए।

2. Explain the mechanism of photo reduction and paterno-buchi reaction with a suitable example.

Photo reduction और paterno-buchi अभिक्रिया की आवश्यक उदाहरण सहित व्याख्या कीजिए।

M.Sc. Chemistry (Previous) Spectroscopy, Computers and Mathematics Sample Paper 1 (English & Hindi)

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Spectroscopy, Computers and Mathematics*/ Biology** – स्पेक्ट्रोस्कोपी, कम्पयूटर्स   तथा गणित*/जीव विज्ञान**

Max Marks: 20

Note: The Internal Assignment has been divided into three sections A, B, and C. Write Answer as per the given instruction.

आतंरिक मूल्यांकन हेतु प्रश्न पत्र ‘A’,’B’ और ‘C’ तीन खण्डों में विभाजित है| प्रत्येक खण्ड के निर्देशानुसार प्रश्नों का उत्तर दीजिए|

 

Section-A

(Very Short Answer Type Questions) अति लघु ऊत्तर वाले प्रश्न (अनिवार्य)

Note: Answer all questions. As per the nature of the question you delimit your answer in one word, one sentence or maximum up to 30 words. Each question carries 1 mark. 4×1=04

नोट: सभी प्रश्नों का उत्तर दीजिए| आप अपने उत्तर को प्रश्नानुसार एक शब्द , एक वाक्य या अधिकतम 30 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 1 अंक का है| 4×1=04

1. How many NMR signals given by acetone.

ऐसीटोन द्वारा कितने NMR सिग्नल दिये जायेंगे?

2. What is molecular ion peak?

मोलिक्यूलर आयन शिखर क्या है?

3. Give the name of scientific language.

वैज्ञानिक भाषा का नाम बताइये।

4. What is the equation of straight line?

सरल रेखा का क्या समीकरण है?

Or

अथवा

What is the full name of ATP?

ATP का पूरा नाम बताइये

 

Section-B

(Short Answer Questions) लघु उत्तर वाले प्रश्न

Note: Answer any 2 questions. Each answer should not exceed 200 words. Each question carries 4 marks.

नोट: निम्नलिखित में से किन्हीं 02 प्रश्नों के उत्तर दीजिए| आप अपने उत्तर को अधिकतम 200 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 4 अंकों का है| 2×4=08

1. What are metastable peaks and their utility in structure ducidation.

मितस्थापी शिखर क्या है? एवं उनकी संरचना विश्लेषण में क्या उपयोगिता है?

2. Write short notes on :

निम्न पर टिप्पणी लिखिये :

Molecular ion peaks आण्विक आयन शिखर

Fast atom bombardment CFAB तेज परमाणु bombardment CFAB

3. What are flow-charts? Give a sketch and explain the use of various symbols used in flow-charts.

फ्लो चार्ट क्या हैं? फ्लो चार्ट में उपयोग आने वाले विभिन्न प्रकार के प्रतीक को स्कैच सहित समझाइये।

4. Explain Chain Rule?

श्रृंखला नियम को समझाइए।

Or

अथवा

Explain the basic structure of Phosphilipids.

फास्फोलिपिडस की मूल संरचना को समझाइए।

 

Section ‘C’

(Long Answer Questions) (दीर्घ उत्तर वाले  प्रश्न)

Note: Answer any one question. You have to delimit your each answer maximum up to 800 words. Each question carries 08 marks.

नोट : निम्नलिखित में से किसी 01 प्रश्न का उत्तर दीजिए|आपको  अपने प्रत्येक उत्तर को अधिकतम 800 शब्दों में परिसीमित करना है| प्रत्येक प्रश्न 08 अंकों का है| 1×8=08

1. What is hydrogen bonding ? Describe how the infrared spectroscopy is useful in identifying the intra and inter molecular hydanigon bonding.

हाइड्रोजन बंधन क्या है? किस प्रकार अवरक्त स्पैक्ट्रोस्कोपी अन्त: व अन्तर हाइड्रेजन बंध के पहचान में काम आती है। समझाइये।

2. Describe the basic components of an NMR spectrometer.

NMR  स्पैक्ट्रोमीटर के मूलभूत components का वर्णन कीजिए।

M.Sc. Chemistry (Previous) Physical Chemistry Sample Paper 1 (English & Hindi)

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Physical Chemistry – भौतिक रसायन

Max Marks: 20

Note: The Internal Assignment has been divided into three sections A, B, and C. Write Answer as per the given instruction.

आतंरिक मूल्यांकन हेतु प्रश्न पत्र ‘A’,’B’ और ‘C’ तीन खण्डों में विभाजित है| प्रत्येक खण्ड के निर्देशानुसार प्रश्नों का उत्तर दीजिए|

 

Section-A

(Very Short Answer Type Questions) अति लघु ऊत्तर वाले प्रश्न (अनिवार्य)

Note: Answer all questions. As per the nature of the question you delimit your answer in one word, one sentence or maximum up to 30 words. Each question carries 1 mark. 4×1=04

नोट: सभी प्रश्नों का उत्तर दीजिए| आप अपने उत्तर को प्रश्नानुसार एक शब्द , एक वाक्य या अधिकतम 30 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 1 अंक का है| 4×1=04

1. What is the formula of potential energy of hydrogen like atom?

हाइड्रोजन जैसे परमाणुओं की स्थितिज उर्जा क्या है?

2. What is the value of efficiency of carnot cycle ()?

कार्नो चक्र की दक्षता () का मान क्या होता है?

3. Write Gibbs Helmgoltz equation.

गिब्स हेल्महोल्टज समीकरण लिखिए।

4. Solution that obey Raoult’s Law are called….

ऐसे विलियन जो राउल्ट के नियम का पालन करते हैं, कहलाते हैं……..

 

Section-B

(Short Answer Questions) लघु उत्तर वाले प्रश्न

Note: Answer any 2 questions. Each answer should not exceed 200 words. Each question carries 4 marks.

नोट: निम्नलिखित में से किन्हीं 02 प्रश्नों के उत्तर दीजिए| आप अपने उत्तर को अधिकतम 200 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 4 अंकों का है| 2×4=08

1. Define and explain second law of thermodynamics.

ऊष्मागतिकी के दूसरे प्रथम नियम की व्याख्या कीजिए।

2. What is Osmosis? How will you demonstrate it in laboratory?

परासरण क्या है? इसका प्रयोगशाला में पदर्शन कैसे करेंगें?

3. Explain Debye-Huckel theory for strong Electrolytes.

प्रबल विद्युत अपघट्यों के लिए डेवाई—कल सिद्धान्त समझाइए।

4. Explain reaction velocity and velocity constant.

अभिक्रिया वेग एवं वेग स्थिरांक समझाइये।

 

Section ‘C’

(Long Answer Questions) (दीर्घ उत्तर वाले  प्रश्न)

Note: Answer any one question. You have to delimit your each answer maximum up to 800 words. Each question carries 08 marks.

नोट : निम्नलिखित में से किसी 01 प्रश्न का उत्तर दीजिए|आपको  अपने प्रत्येक उत्तर को अधिकतम 800 शब्दों में परिसीमित करना है| प्रत्येक प्रश्न 08 अंकों का है| 1×8=08

1. Calculate the expectation values of position and momentum of a free particle in one-dimensional.

एक बिमीय कोष्ठ में स्थित कण के लिए स्थिति एवं संवेग के प्रत्याशित मानों की गणना कीजिए।

2. State and explain Hess law. Define heat of combustion and describe a method for its determination.

हेस नियम का विवेचन कीजिए। दहन उष्मा को परिभाषित कीजिए तथा इसके निर्धारण की एक विधि का वर्णन करो।

M.Sc. Chemistry (Previous) Organic Chemistry Sample Paper 1 (English & Hindi)

by

Organic Chemistry – कार्बनिक रसायन

Max Marks: 20

Note: The Internal Assignment has been divided into three sections A, B, and C. Write Answer as per the given instruction.

आतंरिक मूल्यांकन हेतु प्रश्न पत्र ‘A’,’B’ और ‘C’ तीन खण्डों में विभाजित है| प्रत्येक खण्ड के निर्देशानुसार प्रश्नों का उत्तर दीजिए|

 

Section-A

(Very Short Answer Type Questions) अति लघु ऊत्तर वाले प्रश्न (अनिवार्य)

Note: Answer all questions. As per the nature of the question you delimit your answer in one word, one sentence or maximum up to 30 words. Each question carries 1 mark. 4×1=04

नोट: सभी प्रश्नों का उत्तर दीजिए| आप अपने उत्तर को प्रश्नानुसार एक शब्द , एक वाक्य या अधिकतम 30 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 1 अंक का है| 4×1=04

1. What is the new term of asymmetric carbon or Chiral carbon?

असममित काबन या किरेल कार्बन का नया पद क्या है?

2. What is major advantage of D, L nomenclature?

D, L-नामकरण का मुख्य लाभ क्या है?

3. What happens when aromatic aldoxime aceptates react with

क्या होता है जब ऐरोमैटिक ऐल्डॉक्सिम एसिटेट जलीय के साथ क्रिया करता है?

4. What is the other name of – delexalization?

–  विकेन्द्रीकरण का दूसरा नाम क्या है?

 

Section-B

(Short Answer Questions) लघु उत्तर वाले प्रश्न

Note: Answer any 2 questions. Each answer should not exceed 200 words. Each question carries 4 marks.

नोट: निम्नलिखित में से किन्हीं 02 प्रश्नों के उत्तर दीजिए| आप अपने उत्तर को अधिकतम 200 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 4 अंकों का है| 2×4=08

1. Write short note on Diels, Alder reaction.

डील्स—ऐल्डर अभिक्रिया पर संक्षिप्त् टिप्पणी लिखिए।

2. What is the importance of heterocyclic compounds.

विषमचक्रीय यौगिकों कि क्या उपयोगिता है?

3. How the structure of camphor established from degradation reaction?

अवनति अभिक्रिया द्वारा कैम्फर की संरचना कैसे स्थापित होती है?

4. Explain one synthesis of sucrose.

सूक्रोज बनाने की एक विधि बताइए।

 

Section ‘C’

(Long Answer Questions) (दीर्घ उत्तर वाले  प्रश्न)

Note: Answer any one question. You have to delimit your each answer maximum up to 800 words. Each question carries 08 marks.

नोट : निम्नलिखित में से किसी 01 प्रश्न का उत्तर दीजिए|आपको  अपने प्रत्येक उत्तर को अधिकतम 800 शब्दों में परिसीमित करना है| प्रत्येक प्रश्न 08 अंकों का है| 1×8=08

1. What is kinetic isotope effect? Ilustrate the use of primary kinetic isotope mechanism.

गतिकि समस्थानिक प्रभाव क्या है? अभिकिया की क्रियाविधि समझने में प्राथमिक गतिकि समस्थानिक प्रभाव का उपयोग को समझाइये।

2. Give any three important methods of synthesis of azulene? Discuss the important reactions and aromaticity of azulene.

एजुलीन के निर्माण की तीन विधियां दीजिए। एजुलीन की ऐरोमैटिकता और महत्वपूर्ण अभिक्रियाओं की विवेचना कीजिए।

M.Sc. Chemistry (Previous) Inorganic Chemistry Sample Paper 1 (English & Hindi)

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Inorganic Chemistry – अकार्बनिक रसायन

Max Marks: 20

Note: The Internal Assignment has been divided into three sections A, B, and C. Write Answer as per the given instruction.

आतंरिक मूल्यांकन हेतु प्रश्न पत्र ‘A’,’B’ और ‘C’ तीन खण्डों में विभाजित है| प्रत्येक खण्ड के निर्देशानुसार प्रश्नों का उत्तर दीजिए|

 

Section-A

(Very Short Answer Type Questions) अति लघु ऊत्तर वाले प्रश्न (अनिवार्य)

Note: Answer all questions. As per the nature of the question you delimit your answer in one word, one sentence or maximum up to 30 words. Each question carries 1 mark.

नोट: सभी प्रश्नों का उत्तर दीजिए| आप अपने उत्तर को प्रश्नानुसार एक शब्द , एक वाक्य या अधिकतम 30 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 1 अंक का है|4×1=04

1. How we designate the five d-orbitals?

पांच d-कक्षकों को आप किस प्रकार निर्देशित कर सकते हैं?

2. What is the HSAB rule?

HSAB  नियम क्या है?

3. What is the name of theories to explain the Trans-Effect?

ट्रान्स—प्रभाव की व्याख्या हेतु दिये गये सिद्धान्तों के नाम क्या हैं?

4. Which methods are examples of electro-analytical method for the determination of stability constants of metal complexes?

धातु संकुल के स्थायित्व स्थिरांक को ज्ञात करने हेतु विद्युत—विश्लेषण विधि कौन—सी विधि का उदाहरण है?

 

Section-B

(Short Answer Questions) लघु उत्तर वाले प्रश्न

Note: Answer any 2 questions. Each answer should not exceed 200 words. Each question carries 4 marks.

नोट: निम्नलिखित में से किन्हीं 02 प्रश्नों के उत्तर दीजिए| आप अपने उत्तर को अधिकतम 200 शब्दों में परिसीमित कीजिये| प्रत्येक प्रश्न 4 अंकों का है| 2×4=08

1. Take one example of a molecule and show the presence of Identity element.

एक उदाहरण को लिजिए और एकरूपता तत्व की उपस्थिति को सिद्ध कीजिए।

2. Discuss various factors affecting the crystal field splitting energy in complex compounds.

संकुल यौगिकों में क्रिस्टल क्षेत्र विपाटन ऊर्जा को प्रभावित करने वाले कारकों का वर्णन कीजिए।

3. Under which circumstances the relaxation in Laporte selection rule is given.

लैपोर्ट कक्षक चयन नियम में ढील किन परिस्थितियों में दी जाती है?

4. Explain all the features of an oxidative addition reaction with a specific example of a complex.

आक्सीकृत योगात्मक अभिक्रिया के लिए संकुल के विशिष्ट उदाहरण के सभी कारकों की व्याख्या कीजिए।

 

Section ‘C’

(Long Answer Questions) (दीर्घ उत्तर वाले  प्रश्न)

Note: Answer any one question. You have to delimit your each answer maximum up to 800 words. Each question carries 08 marks.

नोट : निम्नलिखित में से किसी 01 प्रश्न का उत्तर दीजिए|आपको  अपने प्रत्येक उत्तर को अधिकतम 800 शब्दों मेंपरिसीमित करना है| प्रत्येक प्रश्न 08 अंकों का है| 1×8=08

1. Explain the splitting of metal d-orbitals in square planar an tetrahedral field according the crystal field theory.

क्रिस्टल क्षेत्र सिद्धान्त के अनुसार वर्ग समतलीय और चतुष्फलकीय क्षेत्रों के लिए धातु के d-कक्षकों के विपाटन की व्याख्या कीजिए।

2. Discuss the hole formalism and explain how the Hund’s rules are useful in ordering of energy levels.

”छिद्र नियमनिष्ठता” की व्याख्या कीजिए। औश्र समझाइऐ, कैसे हुण्ड का नियम ऊर्जा स्तरों के क्रम को समझने में उपयोगी है?

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