2N₂O₅ ⟶ NO₂ + O₂, \(\frac { d\left[ { N }_{ 2 }{ O }_{ 5 } \right] }{ dt } \) = k₁[N₂O₅], \(\frac { d\left[ { NO }_{ 2 } \right] }{ dt } \)= k₂[N₂O₅] and \(\frac { d{ O }_{ 2 } }{ dt } \) = k ₃[N₂O₅], the relation between k₁, k₂ and k₃ is _____.

(a)

2k₁ = 4k₂ = k₃

(b)

k₁ = k₂ = k₃

(c)

2k₁ = k₂ = 4k₃

(d)

2k₁ = k₂ = k₃

What would be the rate of disappearance of oxygen, if the rate of formation of nitric oxide (NO) is 3.6 x 10^-3mol L^-1 s^-1?

(a)

4 x 10^-3mol L^-1s^-1

(b)

4 x 10^-3mol^-1 L^-1s^-1

(c)

4.5 x 10^-3mol L^-1s^-1

(d)

4.5 x 10^-3mol^-1 L^-1s^-1

For a reaction, 2A + B ⟶ 3C, The rate of appearance of C at time 't' is 1.2 x 10^-4 mol L^-1s^-1. Identify the rate of reaction.

(a)

4 x 10^-5mol L^-1s^-1

(b)

4.5 x 10^-1mol L^-1s^-1

(c)

3.6 x 10^-4 mol L^-1s^-1

(d)

None of these

For the reaction, 2N₂O₅ ⟶4 NO₂+O₂, select the correct statement.

(a)

Rate of formation of O₂ is same as rate of formation of NO₂

(b)

Rate of disappearance of N₂O₅ is two times the rate of formation of NO₂.

(c)

Rate of formation of O₂ is 0.5 times rate of disappearance of N₂O₅

(d)

Rate of formation of NO₂ is equal to rate of disappearance of N₂O₅

In pseudo-order reactions ______.

(a)

The actual order of reaction is different from that expected using rate law expression

(b)

The concentration of at least one reactant is taken in large excess.

(c)

The concentration of reactant taken in excess may be taken as constant

(d)

All of these

The depletion of ozone involves the following steps:
Step 1: O₂ +O \(\overset { { k }_{ 1 } }{ \underset { { k }_{ 2 } }{ \rightleftharpoons } } \) O₃ (fast)
Step 2: O₃ +O \(\overset { k }{ \longrightarrow } \) 2O₂ (slow)
The predicted order of the reaction will be ______.

(a)

I

(b)

II

(c)

III

(d)

Zero

What would be the activation energy of a reaction when the temperature is increased from 27^oC to 37^oC?

(a)

534 kJ mol^-1

(b)

53.4 kJ mol^-1

(c)

5.34 kJ mol^-1

(d)

None of these

A+B \(\longrightarrow \) C; ∆H = 60 kJ mol^-1 Ea_f = 150 kJ. What is the activation energy of the backward reaction?

(a)

210 kJ

(b)

105 kJ

(c)

90 kJ

(d)

145 kJ

(a)

It is a 2 steps reaction, step 1 is slower than step 2

(b)

It is a 2 steps reaction, step 2 is slower than step 1.

(c)

Single step reaction where B is a activated complex

(d)

Single step reaction in which B is a reaction intermediate.

The Unit of rate constant and rate of reaction are same for ______.

(a)

First order

(b)

second order

(c)

Third order

(d)

zero order

Which of the following does not affect the rate of reaction?

(a)

Amount of the reactant taken

(b)

Physical state of the reactant

(c)

∆H of reaction

(d)

Size of vessel

Which of the following statement is not correct?

(a)

Molecularity of a reaction cannot be fractional

(b)

Molecularity of a reaction cannot be more than three

(c)

Molecularity of a reaction can be zero

(d)

Molecularity is assigned for each elementary step of mechanism.

Which order reaction obeys the expression \({ t }_{ \frac { 1 }{ 2 } }\alpha \frac { 1 }{ \left[ A \right] } ?\)

(a)

First

(b)

Second

(c)

Third

(d)

Zero

For an exothermic chemical process occurring in 2 steps as
(i) A +B ⟶ X (slow) ;
(ii) X ⟶  AB (fast)
The progress of the reaction can be best described by (x- intermediate).

(a)

(b)

(c)

(d)

None of these

The graph between the log K versus \(\frac { 1 }{ T } \) is a straight line. The slope of the line is______.

(a)

\(\frac { -2.303R }{ Ea } \)

(b)

\(\frac { Ea }{ 2.303R } \)

(c)

\(\frac { 2.303R }{ Ea } \)

(d)

\(\frac { Ea }{ 2.303R } \)