Physical Chemistry-Chemical Kinetics (CSIR Chemical Sciences): Questions 27 - 30 of 41

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Question number: 27

» Physical Chemistry » Chemical Kinetics » Steady State Approximation

Appeared in Year: 2013

MCQ▾

Question

[ α ] D of a 90 % optically pure 2-aryl propanoic acid solution is + 135 ° . On treatment with a base at RT for one hour, [ α ] D change to +120 . Optical purity is reduced to 40 % after 3hour. If so, the optical purity of solution after, 1 hour, and its [ α ] D after 3 hour, respectively would be. (December)

Choices

Choice (4) Response
a.

20 % and 40%

b.

80 % and 90%

c.

80 % and 60%

d.

70 % and 60%

Question number: 28

» Physical Chemistry » Chemical Kinetics » Photochemical Reactions

Appeared in Year: 2015

MCQ▾

Question

First order rate constant for a animolecular gas phase reaction A products, that follows Lindemann mechanism is 2.0 S1 of PA = 1 atm and 4.0 S1 of PA = 2 atm. The rate constant for activation step is: - (December)

Choices

Choice (4) Response
a.

1.0atm2s1

b.

2.0atm1s1

c.

8.0 atm1s1

d.

4.0atm1s1

Question number: 29

» Physical Chemistry » Chemical Kinetics » Collision and Transition State Theories of Rate Constants

Appeared in Year: 2013

MCQ▾

Question

In a chemical reaction, A(s)+B(g)C(g) total pressure at equilibrium is 6 atm. The value of equilibrium constant is (June)

Choices

Choice (4) Response
a.

36

b.

1

c.

9

d.

12

Question number: 30

» Physical Chemistry » Chemical Kinetics » Empirical Rate Laws and Temperature Dependence

Appeared in Year: 2013

MCQ▾

Question

Isotherm which has fractional coverage, linearly dependent on pressure at low pressure but almost independent at high pressure is called. (June)

Choices

Choice (4) Response
a.

Tonkin isotherm

b.

Langmuir isotherm

c.

Freundlich isotherm

d.

BET isotherm

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