LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS & MATHEMATICS

WO 08

THIRD SEMESTER – April 2009

CH 3202 / 3200 – ADV. GENERAL CHEMISTRY FOR PHYS.& MATHS

 

 

 

Date & Time: 16/04/2009 / 1:00 – 4:00         Dept. No.                                                       Max. : 100 Marks

 

 

PART-A

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

• What is meant by intermolecular hydrogen bonding ? Give an example.
• Write any two consequences of lanthanide contraction?
• Draw the structure of  Ibruprofen . Give its uses.
• State the first law of thermodynamics.
• Mention any two uses of sulphadizine.
• Give any one preparation of thiophene.
• How is a dipeptide formed ? Give an equation.
• What is nuclear fission reaction? Give an example.
• Write the important function of any three essential nutrients for the plant growth.
• Define Octane number.

PART-B

Answer any Eight questions:                                      (8× 5 = 40)

 

• Explain the theory involved in hydrogen bonding .

1. How will you separate o –and p – nitrophenol ?

• How is the solubility of sparingly soluble salt determined ?
• Discuss Born– Haber cycle with an example.
• Define enthalpy of neutralization. Explain why the enthalpy of neutralization of a strong acid vs. strong base is always a constant?
• Derive Kirchoff’s equation.
• Derive the relation connecting ∆E and ∆H for a reaction involving an ideal gas.
• State and explain Kohlrausch’s Law.
• Discuss the open chain formula of glucose.
• Explain the preparation of an amino acid by Gabriel synthesis.
• Describe the classification of enzymes based on IUB system.
• Explain the uses of radioisotopes in medicines and agriculture.
• What are mixed fertilizers? Give any four advantages of it.

 

PART-C

Answer any Four questions:                                                   (10 × 4= 40)

 

• Describe the separation of lanthanides by ion exchange method .(7)

1. ii) Why do ice float on water? (3)

• Give a method of preparation and uses of  sulphanilamide ( 5 )

1. How is naphthalene prepared by Haworth synthesis? (5)

• Explain conductometric titration of (i) strong acid against a strong base

(ii) weak acid against strong base.

• Explain the working principle of  primary reference electrode  (7)

1. What is the electrophile ? Mention the electrophile in sulphonation. ( 3)

• i . Discuss the various factors affecting the enzyme reaction.(8)

ii . Write the lock and key mechanism of an enzymatic reaction.(2)

• Write briefly on any two of the following: (5+5)
  1. Bordeaux mixture.
  2. Chromophores
  3. Photosynthesis
  4. Nuclear fusion

 

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