Chemistry-Rate of Reaction
NEET Chemistry Rate of Reaction MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Which of the following statements about reaction orders and rate constants is correct?
A
A first order reaction has a rate constant that is independent of concentration.
B
The half-life of a zero order reaction increases with decreasing initial concentration.
C
For a first order reaction, the time required for 99% completion is equal to the time for 90% completion.
D
The rate of a zero order reaction is constant and independent of reactant concentration.
Correct Answer
Option D
Detailed Explanation
A zero order reaction has a constant rate that does not depend on the concentration of the reactants, as indicated in the NCERT context. This is distinct from first order and other reaction types where the rate can vary with concentration.
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