Question

Which one of the following statements is not correct?

A. Catalyst does not initiate any reaction
B. The value of equilibrium constant is changed in the presence of a catalyst in the reaction equilibrium  
C. Enzymes catalyse mainly biochemical reaction
D. Coenzymes increase the catalytic activity of enzyme
Answer :   The value of equilibrium constant is changed in the presence of a catalyst in the reaction equilibrium
Solution :
For a reversible reaction, it accelerates the speed of forward as well as backward reaction to the same extent. Hence, it does not disturb the equilibrium, i.e. does not change the equilibrium constant of the reaction but helps to attain the equilibrium faster.

Releted MCQ Question on
Physical Chemistry >> Chemical Kinetics

Releted Question 1

If uranium (mass number 238 and atomic number 92) emits an $$\alpha $$ -particle, the product has mass no. and atomic no.

A. 236 and 92
B. 234 and 90
C. 238 and 90
D. 236 and 90
Releted Question 2

The rate constant of a reaction depends on

A. temperature
B. initial concentration of the reactants
C. time of reaction
D. extent of reaction
Releted Question 3

The specific rate constant of a first order reaction depends on the

A. concentration of the reactant
B. concentration of the product
C. time
D. temperature
Releted Question 4

A catalyst is a substance which

A. increases the equilibrium concentration of the product
B. changes the equilibrium constant of the reaction
C. shortens the time to reach equilibrium
D. supplies energy to the reaction

Practice More Releted MCQ Question on
Chemical Kinetics


Practice More MCQ Question on Chemistry Section