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

Consider the $1^{st}$ order reaction in a closed vessel.
$X (S) \to Y (g) + 2 Z (g)$
If total pressure in vessel after time $' t'$ is $P$ and after a very long time it is $P {}_{\infty},$ then the correct expression for rate constant is

54.69% studentsanswered this correctly

Important Questions on Chemical Kinetics

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

Rate

= K [H_{2} O_{2}]

is an example of

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

The kinetic order for the following reaction is:

$2 N_{2} O (g) \overset{Pt}{\to} 2 N_{2} (g) + O_{2} (g)$

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

The overall order of reaction which has rate expression, Rate

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

HARD

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

In the reaction,

P + Q \to R + S

the time taken for

75 %

reaction of

P

is twice the time taken for

50 %

reaction of

P

. The concentration of

Q

varies with reaction time as shown in the figure.The overall order of the reaction is:

Question Image

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

In a chemical reaction

A + 2 B \to

products, when concentration of

A

is doubled, rate of the reaction increases

4

times and when concentration of

B

alone is doubled rate continues to be the same. The order of the reactions is

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

Rate

= K {[A]}^{1 / 2} {[B]}^{3 / 2} {[C]}^{- 1}

order of the reaction is

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

The sum of the powers of the concentration term that occur in the rate equation is called:

HARD

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

Consider the given plots for a reaction obeying Arrhenius equation $(0 ° C < T < 300 ° C) :$ ( $K$ and $E_{a}$ are rate constant and activation energy, respectively )

(I)

Question Image

(II)

Question Image

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

aP + bQ \to Products

, when

[P]

is doubled keeping

|Q|

constant rate increases

2

times, when

[P]

is constant and

|Q|

is doubled, rate increases four times. The overall order is

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

The rate of a reaction is found to depend upon two concentration variables. What should be the order of the reaction?

HARD

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

According to the Arrhenius equation,

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

For the chemical reaction

$2 O_{3} ⟶ 3 O_{2}$ , the reaction proceeds as follows

$O_{3} ⇌ O_{2} + O$ (Fast)

$O + O_{3} ⟶ 2 O_{2}$ , (Slow)

the rate law expression should be given as

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

The addition of a catalyst during a chemical reaction alters which of the following quantities?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

If rate constant for a reaction is

mol {litre}^{- 1} {second}^{- 1}

then order of reaction is

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

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:

MEDIUM

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

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?

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

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

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

For a certain reaction between

X

and

Y,

the order with respect to

X

3

and that with respect to

Y

4 .

If the concentrations of both

X

and

Y

are tripled. the rate of reaction will increase by a factor of ________

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

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

EASY

Chemistry>Physical Chemistry>Chemical Kinetics>Order of a Reaction

For the elementary reaction

M \to N

, the rate of disappearance of

M

increases by a factor of

8

upon doubling the concentration of

M

. The order of the reaction with respect to

M

Consider the 1st order reaction in a closed vessel. X(S)→Y(g)+2Z(g) If total pressure in vessel after time 't' is P and after a very long time it is P,∞ then the correct expression for rate constant is

Important Questions on Chemical Kinetics

Learn and Prepare for any exam you want !

Consider the $1^{st}$ order reaction in a closed vessel.
$X (S) \to Y (g) + 2 Z (g)$
If total pressure in vessel after time $' t'$ is $P$ and after a very long time it is $P {}_{\infty},$ then the correct expression for rate constant is