PART II : CHEMISTRY
Section I : Single Correct Answer Type
This section contains 8 multiple choice questions. Each question has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct.
1. NiCl2{P(C2H5)2(C6H5)}2 exhibits temperature dependent magnetic behavior (paramagnetic/diamagnetic). The coordination geometries of Ni2+ in the paramagnetic and diamagnetic states are respectively
(A) tetrahedral and tetrahedral
(B) square planar and square planar
(C) tetrahedral and square planar
(D) square planar and tetrahedral
2. In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are
(A) O2 and CO respectively.
(B) O2 and Zn dust respectively.
(C) HNO3 and Zn dust respectively
(D) HNO3 and CO respectively.
3. The reaction of white phosphorus with aqueous NaOH gives phosphine along with another phosphorus containing compound. The reaction type; the oxidation states of phosphorus in phosphine and the product are respectively.
(A) redox reaction; −3 and −5
(B) redox reaction; +3 and +5
(C) disproportion reaction; −3 and +5
(D) disproportion reaction; −3 and + 3
4. The shape of XeO2F2 molecule is
(A) trigonal bipyramidal
(B) square planar
(C) tetrahedral
(D) see-saw
5. For a dilute solution containing 2.5 g of a non-volatile non-electrolyte solute in 100 g of water , the elevation in boiling point at 1 atm pressure is 2℃. Assuming concentration of solute is much lower than the concentration of solvent, the vapour pressure (mm of Hg) of the solution is (take Kb = 0.76 K kg mol−1)
(A) 724
(B) 740
(C) 736
(D) 718
6. The compound that undergoes decarboxylation most readily under mild condition is
(A) 
(B) 
(C) 
(D) 
7. Using the data provided, calculate the multiple bond energy (kJ mol−1) of a C ≡ C bond in C2H2. That energy is (take the bond energy of a C−H bond as 350 kJ mol−1.)
2C(s) + H2(g) → C2H2(g) ∆H = 225 kJ mol−1
2C(s) → 2C(g) ∆H = 225 kJ mol−1
H2(g) → 2H(g) ∆H = 225 kJ mol−1
(A) 1165
(B) 837
(C) 865
(D) 815
8. The major product H of the given reaction sequence is
(A) 
(B) 
(C) 
(D) 
Section II : Paragraph Type
This section contains 6 multiple choices question relating to three paragraphs with two questions on each paragraph. Each question has four choices (A) , (B), (C) and (D) out of the ONLY ONE is correct.
Paragraph for Questions 9 and 10
Bleaching powder and bleach solution are produced on a large scale and used in several house-hold products. The effectiveness of bleach solution is often measured by iodometry.
9. Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is
(A) Cl2O
(B) Cl2O7
(C) ClO2
(D) Cl2O6
10. 25 mL of household bleach solution was mixed with 30 mL of 0.50 M KI and 10 mL of 4 N acetic acid. In the titration of the liberated iodine, 48 mL of 0.25 N Na2S2O3 was used to reach the end point. The molarity of the household bleach solution is
(A) 0.48 M
(B) 0.96 M
(C) 0.24 M
(D) 0.024 M
Paragraph for Questions 11 and 12
The electrochemical cell shown below is a concentration cell.
M | M2+ (saturated solution of a sparingly soluble salt, MX2) || M2+ (0.001 mol dm−3) | M
The emf of the cell depends on the difference in concentrations of M2+ ions at the two electrodes.
The emf of the cell at 298 K is 0.059 V.
11. The solubility product (Ksp; mol3 dm−9) of MX2 at 298 K based on the information available for the given concentration cell is (take 2.303 × R × 298/F = 0.059 V)
(A) 1 × 10−15
(B) 4 × 10−15
(C) 1 × 10−12
(D) 4 × 10−12
12. The value of ∆G (kJ mol−1) for the given cell is (take 1F = 96500 C mol−1)
(A) −5.7
(B) 5.7
(C) 11.4
(D) −11.4
Paragraph for Questions 13 and 14
In the following reaction sequence, the compound J is an intermediate.
J (C9H8O2) gives effervescence on treatment with NaHCO3 and a positive Baeyer’s test.
13. The compound I is
(A) 
(B) 
(C) 
(D) 
14. The compound K is
(A) 
(B) 
(C) 
(D) 
Section III : Multiple Correct Answer(s) Type
This section contains 6 multiple choice questions. Each question has four choices (A), (B), (C) and (D) out of which ONE or MORE are correct.
15. The reversible expansion of an ideal gas under adiabatic and isothermal conditions is shown in the figure. Which of the following statement (s) is (are) correct?
(A) T1 = T2
(B) T3 > T1
(C) wisothermal > wadiabatic
(D) ∆Uisothermal > ∆Uadiabatic
16. The given graph I data I, II, III and IV represent general trends observed for different physisorption and chemisorptions processes under mild conditions of temperature and pressure. Which of the following choice(s) about I, II, III and IV is (are) correct ?
(A) I is physisorption and II is chemisorption
(B) I is physisorption and II is chemisorption
(C) IV is chemisorptions and II is chemisorption
(D) IV is chemisorptions and III is chemisorption
17. For the given aqueous reactions, which of the statement(s) is (are) true ?
(A) The first reaction is redox reaction.
(B) White precipitate is Zn3[Fe(CN)6]2.
(C) Addition of filtrate to starch solution gives blue colour.
(D) White precipitate is soluble in NaOH solution.
18. With respect to graphite and diamond, which of the statement(s) given below is (are) correct?
(A) Graphite is harder than diamond.
(B) Graphite has higher electrical conductivity than diamond.
(C) Graphite has higher thermal conductivity than diamond.
(D) Graphite has higher C-C bond order than diamond.
19. With reference to the scheme given, which of the given statement (s) about T, U, V and W is (are) correct?
(A) T is soluble in hot aqueous NaOH
(B) U is optically active
(C) Molecular formula of W is C10H18O4
(D) V gives effervescence on treatment with aqueous NaHCO3
20. Which of the given statement(s) about N, O, P and Q with respect to M is (are) correct ?
(A) M and N are non-mirror image stereoisomers
(B) M and O are identical
(C) M and P are enantiomers
(D) M and Q are identical
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