Verified Solution • 2025–26 Session
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QNEET-2018-Ch-843: NEET 2018 Chemistry - Class 12 NEET-2018-Ch-843 Solution: The correct difference between first and second order reactions …
The correct difference between first and second order reactions is that the rate of a first-order reaction does not depend on reactant concentrations; the rate of a second-order reaction does depend on reactant concentrations the half-life of a first-order reaction does not depend on ; the half-life of a second order reaction does depend on a first-order reaction can be catalysed; a second-order reaction cannot be catalysed the rate of a first-order reaction does depend on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations
Multiple Choice Options
- A the rate of a first-order reaction does not depend on reactant concentrations; the rate of a second-order reaction does depend on reactant concentrations
- B the half-life of a first-order reaction does not depend on [A] 0 ; the half-life of a second order reaction does depend on [A] 0
- C a first-order reaction can be catalysed; a second-order reaction cannot be catalysed
- D the rate of a first-order reaction does depend on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations
Step-by-Step Verified Solution
For the first order reaction, t 1/2 = 0.693 k
which is independent of initial concentration [A] 0 .
For second order reaction, t 1/2 = 1 k [ A ] 0
which depends on initial concentration [A] 0 .