Physical Chemistry-Chemical Kinetics [CSIR (Council of Scientific & Industrial Research) Chemical Sciences]: Questions 26 - 30 of 55

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Question 26

Appeared in Year: 2013

Question MCQ▾

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

Choices

Choice (4)Response

a.

0.5

b.

1.5

c.

1

d.

2

Edit

Question 27

Appeared in Year: 2013

Question MCQ▾

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

Choices

Choice (4)Response

a.

70% and 60%

b.

80% and 90%

c.

80% and 60%

d.

20% and 40%

Edit

Question 28

Appeared in Year: 2015

Question MCQ▾

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

Choices

Choice (4)Response

a.

b.

c.

8.0

d.

Edit

Question 29

Appeared in Year: 2013

Question MCQ▾

In a chemical reaction, total pressure at equilibrium is 6 atm. The value of equilibrium constant is (June)

Choices

Choice (4)Response

a.

36

b.

c.

9

d.

1

Edit

Question 30

Appeared in Year: 2013

Question MCQ▾

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.

Freundlich isotherm

b.

BET isotherm

c.

Tonkin isotherm

d.

Langmuir isotherm

Edit