GATE XL Model Questions GATE XL Previous Year Papers
GATE Life Sciences (XL) 2010
(Graduate Aptitude Test in Engineering: Original Question Paper)
Chemistry (H) Compulsory Paper
Question 1 – 5 carries one mark each:
1. For a spontaneous process. The total entropy change (∆Ssystem + ∆Ssurroundings) is:
a. Equal to zero
b. Greater than zero
c. Less than zero for endothermic process
d. Less than zero for exothermic process
2. A battery delivers a steady current of 1.25 A for 90 minutes. The total charge ‘Q’ (in Coulomb units) is:
a. 6750
b. 1012.5
c. 112.5
d. 12.5
3. Molecule that has no lone pair of electrons on the central atom (among the choices) is
a. XeF4
b. PF3
c. ClF3
d. BF3
4. The oxidation state of nickel atom in the coordination compound [Ni(NH3)3Cl]Cl is:
a. -1
b. 0
c. +1
d. +2
5. The compound that is aromatic, among the choices is:
Questions 6 – 15 Carries two marks each:
6. Consider the following equilibrium reaction:
CO(g) + Cl2 (g) ⥨ COCl2 (g)
0.60 atm of CO and 1.10 atm of Cl2 were mixed in a constant volume reaction vessel at a particular temperature. After the equilibrium was established, 0.10 atm of COCl2 was observed. The equilibrium constant of the reaction is:
a. 0.02
b. 0.15
c. 0.20
d. 6.60
7. For a particular reaction, the use of a catalyst reduces the activation energy (Ea) to one third its original value. The ratio of rate constant (Kcatalyzed/Kuncatalyzed) is:
a. 1
b. 1/3
c. Exp (2Ea/3RT)
d. Exp (Ea/3RT)
8. Among heptan-1-ol, heptan-2-ol, heptan-3-ol and heptan-4-ol, compounds those exhibit optical activity are:
a. Heptan-2-ol and heptan-3-ol
b. Heptan-2-ol and heptan-4-ol
c. Heptan-3-ol and heptan-4-ol
d. Heptan-1-ol and heptan-4-ol
9. Structure of the compound Y in the following reaction sequence is:
10. The ionization energy follows the order:
a. O2+ > O2 > O2- > O22-
b. O2 > O2+ > O22- > O2-
c. O2- > O22- > O2+ > O2
d. O22- > O2 > O2- > O2+
11. Reaction of Na2SO3 with 2 equivalents of HCL produces a gas X, Solution of X in water is acidic in nature, X is:
a. O2
b. Cl2
c. SO2
d. H2S
Common data for question 12 and 13
The ionization constants of phosphorous acid (H3PO4) are Ki1 = 3 X 10-2; Ki2 = 1.7 X 10-7
12. For a dilute solution of phosphorous acid in a pH 5 buffer, the predominant species is:
a. H3PO3
b. H2PO3-
c. HPO32-
d. PO33-
13. The structure of phosphorous acid is:
Linked Answer Questions:
Consider the reaction sequence:
14. The structure of X in the above reaction sequence is :
15. The structure of Y in the above reaction sequence is:
Download all Previous GATE XL – Chemistry Question Papers
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