EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 17 - Chemical Kinetics>WBJEE 2019>Q 1

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Consider the following two first order reactions occurring at $298 K$ with same initial concentration of $A :$

(1) $A \to B;$ rate constant, $k = 0.693 \min^{- 1}$

(2) $A \to C;$ half-life, $t_{1 / 2} = 0.693 \min$

Choose the correct option.

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Important Questions on Chemical Kinetics

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 17 - Chemical Kinetics>WBJEE 2019>Q 2

The half-life period of

{}_{53}125

is 60 days. The radioactivity after 180 days will be

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 17 - Chemical Kinetics>WBJEE 2018>Q 3

The half-life of

C^{14}

is

5760

years. For a

200 mg

sample of

C^{14},

the time taken to change to

25 mg

is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 17 - Chemical Kinetics>WBJEE 2020>Q 4

For a reaction

2 A + B \to P,

when concentration of

B

alone is doubled,

t_{1 / 2}

does not change and when concentrations of both

A

and

B

is doubled, rate increases by a factor of

4 .

The unit of rate constant is,

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 17 - Chemical Kinetics>WBJEE 2019>Q 5

The kinetic study of a reaction like $A \to P$ at $300 K$ provides the following curve, where concentration is taken in mol ${dm}^{- 3}$ and time in min.

Question Image

Identify the correct order $(n)$ and rate constant $(k)$