PART II : CHEMISTRY

Section I : Single Correct Answer Type

This section contains 10 multiple choice questions. Each question has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct.

1. In allene (C₃H₄), the type(s) of hybridization of the carbon atoms is (are)

(A)  sp and sp³

(B)  sp and sp²      

(C)  only sp²

(D)  sp² and sp³

Show Answer

2. For one mole of a van der Waals gas when b = 0 and T = 300 K, the PV vs. I/V plot is shown below. The value of the van der Waals constant a(atm. liter² mol⁻²) is

(A)  1.0

(B)  4.5

(C)  1.5

(D)  3.0

Show Answer

3. The number of optically active products obtained from the complete ozonolysis of the given compound is

(A)  0

(B)  1

(C)  2

(D)  4

Show Answer

4. A compound M_pX_q has cubic close packing (ccp) arrangement of X. Its unit cell structure is shown below. The empirical formula of the compound is

(A)  MX

(B)  MX₂

(C)  M₂X

(D)  M₅X₁₄

Show Answer

5. The number of aldol reaction (s) that occurs in the given transformation is

(A)  1

(B)  2

(C)  3

(D)  4

Show Answer

6. The colour of light absorbed by an aqueous of CuSO₄ is

(A)  orange-red

(B)  blue-green

(C)  yellow

(D)  violet

Show Answer

7. The carboxyl functional group (−COOH) is present in

(A)  picric acid

(B)  barbituric acid

(C)  ascorbic acid

(D)  aspirin

Show Answer

8. The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is [a₀ is Bohr radius]

(A)   

(B)   

(C)   

(D)   

Show Answer

9. Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen ?

(A)  HNO₃, NO, NH₄Cl, N₂

(B)  HNO₃, NO, N₂, NH₄Cl       

(C)  HNO₃, NH₄Cl, NO, N₂

(D)  NO, HNO₃, NH₄Cl, N₂

Show Answer

10. As per IUPAC nomenclature, the name of the complex [Co(H₂O)₄(NH₃)₂]Cl₃ is

(A)  Tetraaquadiaminecobalt (III) chloride

(B)  Tetraaquadiamminecobalt (III) chloride

(C)  Diaminetetraaquacobalt (III) chloride

(D)  Diamminetetraaquacobalt (III) chloride

Show Answer

Section II : Multiple Correct Answer(s) Type

The section contains 5 multiple choice questions. Each question has hour choices (A), (B), (C) and (D) out of which ONE or MORE are correct.

11. Identify the binary mixture (s) that can be separated into individual compounds, by differential extraction, as shown in the given scheme.

(A)  C₆H₅OH and C₆H₅COOH

(B)  C₆H₅COOH and C₆H₅CH₂OH

(C)  C₆H₅CH₂OH and C₆H₅OH

(D)  C₆H₅CH₂OH and C₆H₅CH₂COOH

Show Answer

12. Choose the correct reason(s) for the stability of the lyophobic colloidal particles.

(A)  Preferential absorption of ions on their surface from the solution

(B)  Preferential adsorption of solvent on their surface from the solution

(C)  Attraction between different particles having opposite charges on their surface

(D)  Potential difference between the fixed layer and the diffused layer of opposite charges around the colloidal particles

Show Answer

13. Which of the following molecules, in pure form, is (are) unstable at room temperature ?

(A)  

(B)  

(C)  

(D)  

Show Answer

14. Which of the following hydrogen halides react(s) with AgNO₃(aq) to give a precipitate that dissolves in Na₂S₂O₃(aq) ?

(A)  HCl

(B)  HF

(C)  HBr

(D)  HI

Show Answer

15. For an ideal gas, consider only P-V work in going from an initial state X to the final state Z. The final state Z can be reached by either of the two paths shown in the figure. Which of the following choice(s) is (are) correct ? [take ∆S as change in entropy and w as work done]

(A)  ∆S_{x → z} = ∆S_{x → y} + ∆S_{y → z}

(B)  w_{x → z} = w_{x → y} + w_{y → z}

(C)  w_{x → y → z} = w_{x → y}

(D)  ∆S_{x → y → z} = ∆S_{x → y}

Show Answer

SECTION III : Integer Answer Type

This section contains 5 questions. The answer to each question is a single digit integer, ranging from 0 to 9 (both inclusive).

16. The substituents R₁ and R₂ for nine peptides are listed in the table given below. How many of these peptides are positively charged at pH = 7.0?

Show Answer

17. The periodic table consists of 18 groups. An isotope of copper, on bombardment with protons,, undergoes a nuclear reaction yielding element X as shown below. To which group, element X belongs in the periodic table ?

Show Answer

18. When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form is

Show Answer

19. 29. 2% (w/w) HCl stock solution has a density of 1.25 g mL⁻¹. The molecular weight of HCl is 36.5 mol⁻¹. The volume (mL) of stock solution required t prepare a 200 mL solution of 0.4 M HCl is

Show Answer

20. An organic compound undergoes first-order decomposition. The time taken for its decomposition to 1/8 and 1/10 of its initial concentration are t_1/8­ and t_1/10

What is the value of  (take log₁₀ 2 = 0.3)

Show Answer

Latest Govt Job & Exam Updates:

View Full List ...