chemical kinetics mcqs

 

CHAPTER 9

INTRODUCTION TO CHEMICAL KINETICS

Q. 1. The number of atoms or molecules whose concentration determines the rate of a chemical reaction is called the

a. molecularity of the reaction

b. order of the reaction

c. specific activity of the reaction

d. rate constant of the reaction

(b)

 

Q. 2. A scientist prepared a compound in laboratory. He found that it has two forms, one amorphous form and another crystalline form C. Both A and C reacts with sulfuric acid. One possible predication is that

a. increases with increase in concentration of the reactants

b. decreases with increase in concentration of the reactants

c. increases with increase in concentration of the products

d. decreases with increase in concentration of the products

(a)

 

Q. 3. The rate of an irreversible reaction

a. increase with increase in concentration of the reactants

b. decreases with increase in concentration of the reactants

c. increases with increase in concentration of the products

d. decreases with increase in concentration of the products

(a)

 

Q. 4. Consider the following equation

K = A e- RT

Ea In this equation

a. A is a molecule of the reactant

b. A is a molecule of the product

c. A is proportionality constant

d. A is Arrhenius constant

(d)

 

 

Q. 6. A substance which increases the efficiency of a catalyst is termed as

a. Promoter

b. Activator

c. Retarder

d. Super catalyst

(a)

 

Q. 7. “Rancidity produced in butter can be decreased by adding quinoline to the butter”. This statements

shows that

a. nothing is impossible

b. quinoline is an inhibitor

c. quinoline is a catalyst

d. quinoline is an activator

(b)

 

Q. 8. Ammonia can be produce according to the following reaction

N2 + 3H2 Fe2O3 2NH3

A12O3, K2O

In this reaction

a. Fe2O3 and AI2O3 are catalysts while K2O is a promoter

b. Fe2O3 is catalyst while AL2O3 and K2O are promoters

c. AI2O3 and K2O are catalysts while AI2O3 is a promoter

d. Fe2O3 and K2O are catalysts while AI2O3 is a promoter

(b)