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 |
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. |
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 |
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 |
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. |