Under what condition the order of the reaction, 2 H I → H 2 g + I 2 g , is zero

At high partial pressure of H I

At high partial pressure of H 2

At high partial pressure of I 2

For the reaction, 2 A + B → products, when the concentration of A and B both were doubled, the rate of the reaction increased from 0.3 m o l L - 1 s - 1 to 2.4 m o l L - 1 s - 1 . When the concentration of A alone is doubled, the rate increased from 0.3 m o l L - 1 s - 1 to 0.6 m o l L - 1 s - 1 . Which one of the following statements is correct?

Order of the reaction with respect to B is 2

Total order of the reaction is 4

Order of the reaction with respect to A is 2

Order of the reaction with respect to B is 1

HARD

Earn 100

The half-life of radioisotopic bromine - $82$ is $36$ hours. The fraction which remains after one day is _________ $\times 10^{- 2}$ .
(Given antilog $0.2006 = 1.587)$

Round off to the nearest integer

50% studentsanswered this correctly

Important Questions on Chemical Kinetics

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

The rate constant for a first order reaction is

7 .0 \times 10^{- 4} s^{- 1} .

If initial concentration of the reactant is

0.080 M

, what is the half-life of the reaction?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction is:

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

It takes

1 h

for a first order reaction to go to

50 %

completion. The total time required for the same reaction to reach

87.5 %

completion will be

HARD

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

The data given below are for the reaction of

A

and

D_{2}

to form product at

295 K

. Find the correct rate expression for this reaction

$\frac{D_{2}}{m o l L^{- 1}}$	$\frac{A}{m o l L^{- 1}}$	$\frac{I n i t i a l r a t e}{m o l L^{- 1} s^{- 1}}$
$0.05$	$0.05$	$1 \times 10^{- 3}$
$0.15$	$0.05$	$3 \times 10^{- 3}$
$0.05$	$0.15$	$9 \times 10^{- 3}$

HARD

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

For an elementary chemical reaction, $A_{2} ⇄_{k_{- 1}}^{k_{1}} 2 A$ , the expression for $\frac{d [A]}{dt}$ is:

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

Under what condition the order of the reaction,

2 H I \to H_{2} (g) + I_{2} (g),

is zero

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

If 50 % of a reaction occurs in 100 second and 75 % of the reaction occurs in 200 second, the order of this reaction is:

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

A first-order reaction has a specific reaction rate

10^{- 2} \sec^{- 1} .

How much time will it take for

20 g

the reactant to reduce to

5 g

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

The rate constant of the reaction

A ⟶ B

0.6 \times 10^{- 3}

mole per liter per second. If the initial concentration of A is 5 M, then the concentration of B after 20 minutes is:

HARD

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

The reaction

2 N_{2} O_{5} (g) \to 4 N O_{2} (g) + O_{2} (g)

follows first order kinetics. The pressure of a vessel containing only

N_{2} O_{5}

was found to increase from 50 mm Hg to 87.5 mm Hg in 30 min. The pressure exerted by the gases after 60 min. Will be (Assume temperature remains constant) :

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

Find the unit of the rate constant of a reaction represented with a rate equation, rate

= k {[A]}^{\frac{1}{2}} {[B]}^{\frac{3}{2}}

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

Decomposition of

X

exhibits a rate constant of

0 .05 μg / year

. How many years are required for the decomposition of

5 μg

X

into

2 .5 μg

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

For a zero - order reaction with rate constant k, the slope of the plot reactant concentration against time is

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

Which among the following reactions can be an example of pseudo first order reaction?

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

Mechanism of a hypothetical reaction

X_{2} + Y_{2} \to 2 XY

is given below:

(i)

X_{2} \to X + X (fast)

(ii)

X + Y_{2} ⇌ XY + Y (slow)

(iii)

X + Y \to XY (fast)

The overall order of the reaction will be

HARD

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

518^{o} C,

the rate of decomposition of a sample of gaseous acetaldehyde, initially at a pressure of

363 Torr

was

1 .00 Torr s^{- 1}

when

5 %

had reacted and

0 .50 Torr s^{- 1}

when 33% had reacted. The order of the reaction is:

HARD

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

The half-life period of a first-order reaction is

15 minutes

. The amount of substance left after one hour will be

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

A + 2 B \to C

, the rate equation for the reaction is given as

Rate

= k [A] [B]

If the concentration of A is kept the same but that of B is doubled what will happen to the rate itself?

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

For the reaction,

2 A + B \to

products, when the concentration of

A

and

B

both were doubled, the rate of the reaction increased from

0.3 m o l L^{- 1} s^{- 1}

2.4 m o l L^{- 1} s^{- 1} .

When the concentration of

A

alone is doubled, the rate increased from

0.3 m o l L^{- 1} s^{- 1}

0.6 m o l L^{- 1} s^{- 1} .

Which one of the following statements is correct?

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Dependence of Rate on Reactant Concentrations

The rate of a first-order reaction is

0.04 m o l l^{- 1} s^{- 1}

10

second and

0.03 m o l l^{- 1} s^{- 1}

20

seconds after initiation of the reaction. The half-life period of the reaction is:

The half-life of radioisotopic bromine - 82 is 36 hours. The fraction which remains after one day is _________×10-2. (Given antilog 0.2006=1.587) Round off to the nearest integer

Important Questions on Chemical Kinetics

Learn and Prepare for any exam you want !

The half-life of radioisotopic bromine - $82$ is $36$ hours. The fraction which remains after one day is _________ $\times 10^{- 2}$ .
(Given antilog $0.2006 = 1.587)$

Round off to the nearest integer