Physical Chemistry-Chemical Kinetics [CSIR (Council of Scientific & Industrial Research) Chemical Sciences]: Questions 1 - 5 of 55

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Question 1

Appeared in Year: 2014

Question MCQ▾

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.

0.6

c.

0.2

d.

0.1

Edit

Question 2

Appeared in Year: 2013

Question MCQ▾

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

Choices

Choice (4)Response

a.

ln k decreases linearly with T.

b.

c.

ln k increases linearly with 1T .

d.

ln k increases linearly with T.

Edit

Question 3

Appeared in Year: 2013

Question MCQ▾

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.

2

d.

0

Edit

Question 4

Appeared in Year: 2014

Question MCQ▾

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.

1 only

b.

3 only

c.

2 and 3 only

d.

1 and 4 only

Edit

Question 5

Appeared in Year: 2014

Question MCQ▾

Temperature dependence of a reaction is given by,

.

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

Choices

Choice (4)Response

a.

b.

c.

d.

Edit