Physical Chemistry-Chemical Kinetics (CSIR (Council of Scientific & Industrial Research) Chemical Sciences): Questions 1 - 5 of 41

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Question number: 1

» Physical Chemistry » Chemical Kinetics » Photochemical Reactions

Appeared in Year: 2014

MCQ▾

Question

Fluorescence lifetime of a molecule in a solution is Sum of all non-radioactive rate constant for decay of excited state is 1.2 . The fluorescence quantum yield of molecules is: - (June)

Choices

Choice (4) Response

a.

0.4

b.

0.2

c.

0.1

d.

0.6

Question number: 2

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

Appeared in Year: 2013

MCQ▾

Question

According to Arrhenius equation (k = rate constant) and T = temperature.

Choices

Choice (4) Response

a.

ln k increases linearly with T.

b.

c.

ln k increases linearly with 1T.

d.

ln k decreases linearly with T.

Question number: 3

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

Appeared in Year: 2013

MCQ▾

Question

Concentration of A undergoing reactions A→D is 1.0 (T = 0), 0.5 (T = 1), 0.33 (t = 2) and 0.25 (t = 3) seconds. Order of reaction is (June CSIR)

Choices

Choice (4) Response

a.

3

b.

1

c.

0

d.

2

Question number: 4

» Physical Chemistry » Chemical Kinetics » Steady State Approximation

Appeared in Year: 2014

MCQ▾

Question

Examine the following first order consecutive reaction. The rate constant (in units) for each step is given above the arrow mark.

Steady-state approximation for backward reaction can be applied to:

Choices

Choice (4) Response

a.

3 only

b.

2 and 3 only

c.

1 only

d.

1 and 4 only

Question number: 5

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

Appeared in Year: 2014

MCQ▾

Question

Temperature dependence of a reaction is given by,

.

Activation energy (Ea) of the reaction is (June)

Choices

Choice (4) Response

a.

b.

c.

d.

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