AIPMT 2011 Solved Papers
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Chemistry 2011
Q. 16. The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e. l1 and l2 will be
(1) λ1 = 1/2 λ2 (2) λ1 = λ2
(3) λ1 = 2λ2 (4) λ1 = 4λ2
Sol.
(3) λ1 = 2λ2
Answer : (3)
Q. 17. Standard electrode potential of three metals X, Y and Z are –1.2 V, +0.5 V and –3.0 V respectively. The reducing power of these metals will be
(1) X > Y > Z (2) Y > Z > X
(3) Y > X > Z (4) Z > X > Y
Sol.
Z > X > Y; higher the reduction potential lesser the reducing power
Answer : (4)
Q. 18. Which one of the following statements for the order of a reaction is incorrect?
(1) Order of reaction is always whole number
(2) Order can be determined only experimentally
(3) Order is not influenced by stoichiometric coefficient of the reactants
(4) Order of reaction is sum of power to the concentration terms of reactants to express the rate of reaction
Sol:
Fact
Answer : (1)
Q. 19. Enthalpy change for the reaction, 4H(g) → 2H2(g) is –869.6 kJ. The dissociation energy of H – H bond is
(1) +217.4 kJ (2) –434.8 kJ
(3) –869.6 kJ (4) +434.8 kJ
Sol:
The dissociation energy of H – H bond is 869.6/2 = 434.8 KJ
Answer : (4)
Q. 20. If n = 6, the correct sequence of filling of electrons will be
(1) ns → np(n -1)d → (n - 2)f (2) ns → n(n - 2)f → (n -1)d → np
(3) ns → (n -1)d → (n - 2)f → np (4) ns → (n - 2)f → np → (n -1)d
Sol:
Fact
Answer : (2)