Physical Chemistry (CSIR (Council of Scientific & Industrial Research) Chemical Sciences): Questions 29 - 32 of 215

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Question number: 29

» Physical Chemistry » Chemical Kinetics » Complex Reactions

Appeared in Year: 2013

MCQ▾

Question

Equation In mechanism of this reaction first step is: (December)

Choices

Choice (4) Response

a.

Dissociation of H2 into HEquation radical

b.

Reaction of BrEquation radical with H2

c.

Dissociation of Br2 into BrEquation radical

d.

Reaction of HEquation radical with Br2

Question number: 30

» Physical Chemistry » Chemical Kinetics » Complex Reactions

Appeared in Year: 2013

MCQ▾

Question

In Lindeman mechanism of unimolecular reaction, observed order of low concentration is (June)

Choices

Choice (4) Response

a.

1

b.

2

c.

1.5

d.

0.5

Question number: 31

» Physical Chemistry » Chemical Kinetics » Steady State Approximation

Appeared in Year: 2013

MCQ▾

Question

[Equation ] D of a 90 % optically pure 2-aryl propanoic acid solution is + 135Equation . On treatment with a base at RT for one hour, [Equation ] D change toEquation . Optical purity is reduced to 40 % after 3hour. If so, the optical purity of solution after, 1 hour, and its [Equation ] 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: 32

» Physical Chemistry » Chemical Kinetics » Photochemical Reactions

Appeared in Year: 2015

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

8.0 Equation

d.

Equation

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