EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 27 - Chemical Kinetics>AP EAPCET - 20 Aug 2021 Forenoon>Q 1

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Important Questions on Chemical Kinetics

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 27 - Chemical Kinetics>AP EAPCET - 20 Aug 2021 Afternoon>Q 2

For a

A + B \to

products the rate of the reaction is given by Rate

= K [A] [B]^{2}

. The units of rate constant

(K)

will be

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 27 - Chemical Kinetics>AP EAPCET 2019 (21-Apr Shift-2)>Q 3

The rate constants for a reaction at

400 K

and

500 K

are

2.60 \times 10^{- 5} s^{- 1}

and

2.60 \times 10^{- 3} s^{- 1}

,respectively. The activation energy of the reaction in

{kJmol}^{- 1}

is ______

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 27 - Chemical Kinetics>AP EAPCET 2020 (Sep-23 Shift-1)>Q 4

The rate constant is same for

3

reactions of order

I

,

II

and

III

, respectively, the unit of concentration being in moles per litre. If the concentration of the reactant is unity, the rates of reaction

R_{1}, R_{2}, R_{3}

will be

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 27 - Chemical Kinetics>AP EAPCET 2018 (25-APR Shift-1)>Q 5

The rate equation for a first-order reaction is given by

[R] = {[R]}_{0} e^{- kt}

. A straight line with positive slope is obtained by plotting (

{[R]}_{0} =

Initial concentration of the reactant,

[R] =

concentration of the reactant at time

t

)

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 27 - Chemical Kinetics>AP EAPCET 2021 (19-Aug Forenoon)>Q 6

If the rate constant for a first order reaction is

2.303 \times 10^{- 3} s^{- 1}

, find the time required to reduce

4 g

of the reactant to

0.2 g

.

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 27 - Chemical Kinetics>AP EAPCET - 20 Aug 2021 Afternoon>Q 7

For an elementary reaction,

X_{(g)} ⟶ Y_{(g)} + Z_{(g)}

, the

t_{1 / 2}

is

10

minutes. In what period of time would the concentration of

X

be reduced to

10 %

of its original concentration?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 27 - Chemical Kinetics>AP EAPCET 2020 (Sep-23 Shift-1)>Q 8

For a first order reaction $A_{5} \to 5 B_{2}$ , the concentrations vs time plot is as shown. The half-life of the reaction is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 27 - Chemical Kinetics>AP EAPCET - 20 Aug 2021 Forenoon>Q 9

For zero order reaction, a plot of

t_{1 / 2}

versus

[A]_{0}

will be