Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 4 - Chemical Kinetics>TOPICWISE QUESTIONS>Q 1

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IMPORTANT

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Which among the following represents the fastest reaction?

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Important Questions on Chemical Kinetics

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 4 - Chemical Kinetics>TOPICWISE QUESTIONS>Q 2

For a reaction,

2 {NH}_{3} \to N_{2} + 3 H_{2},

it is given that

- \frac{d [{NH}_{3}]}{dt} = k_{1} [{NH}_{3}], \frac{d [N_{2}]}{dt} = k_{2} [{NH}_{3}]

and

\frac{d [H_{2}]}{dt} = k_{3} [{NH}_{3}] .

What is the relation between

k_{1}, k_{2}

and

k_{3}

?

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 4 - Chemical Kinetics>TOPICWISE QUESTIONS>Q 3

A gaseous reaction is first order with respect to

A

and

B

each. If the volume of the reaction vessel is reduced to one-fifth of the initial volume, the reaction rate becomes

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 4 - Chemical Kinetics>TOPICWISE QUESTIONS>Q 4

The rate of disappearance of

O_{2}

in the reaction

2 {SO}_{2} + O_{2} \to 2 {SO}_{3}

is

2.4 \times 10^{- 3} mol L^{- 1} s^{- 1} .

What is the rate of formation of

{SO}_{3}

?

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 4 - Chemical Kinetics>TOPICWISE QUESTIONS>Q 5

For a first-order reaction

A \to B,

the rate of reaction is

4 \times 10^{- 4} mol L^{- 1} s^{- 1}

when

[A] = 2 \times 10^{- 2} mol L^{- 1} .

What will be the value of rate constant when

[A]

is increased to

4 \times 10^{- 2} mol L^{- 1} ?

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 4 - Chemical Kinetics>TOPICWISE QUESTIONS>Q 6

For a reaction, rate

= k [A]^{0} [B]^{1} [C]^{2}

. If the concentration of all the reactants is increased by

50 %

, by how many times will the rate of reaction increase?

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 4 - Chemical Kinetics>TOPICWISE QUESTIONS>Q 7

The instantaneous rate of disappearance of ${MnO}_{4}^{-}$ ion in the following reaction is $4.56 \times 10^{- 3} M s^{- 1}$ .

$2 {MnO}_{4}^{-} + 10 I^{-} + 16 H^{+} \to 2 {Mn}^{2 +} + 5 I_{2} + 8 H_{2} O .$

What is the rate of appearance of $I_{2}$ ?

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 4 - Chemical Kinetics>TOPICWISE QUESTIONS>Q 8

The reaction

X \to Y

follows third order kinetics. If the concentration of

X

is doubled, the rate of formation of

Y

will become

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 4 - Chemical Kinetics>TOPICWISE QUESTIONS>Q 9

For the reaction

H_{2} + I_{2} \to 2 HI,

the rate of disappearance of iodine is

10^{- 6} mol L^{- 1} s^{- 1}

. What will be the rate of formation of

HI

?