Question

Q. When one reactant is present in large excess in a chemical reaction between two substances, then the reaction is known as
A)second order reaction
B)pseudo first order reaction
C)zero order reaction
D)first order reaction

Answer 1

Answer:

B) pseudo first order reaction

Explanation:

This is because even though the reaction is taking place between two reactants, and it is expected o behave as a first order reaction; but since, one of the reactant is present in excess, the rate of the reaction depends upon the molar concentration of only one reactant, THEREFORE, it is known as pseudo first order reaction.