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The correct difference between first and second order reactions is that

Answer»

A FIRST order reaction can be catalysed, a second order reaction cannot be catalysed.
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)]`.
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 rate of a first order reaction does depend on reactant concentrations, the rate of a second order reaction does not depend on reactant concentrations.

Solution :For a first order reaction
`t_(1//2)=0.6932/k`
For a second order reaction
`t_(1//2)=(2^(n-1)-1)/((n-1)k[A_(0)]^(n-1)),n=2`
`t_(1//2)=(2^(2-1)-1)/((2-1)k[A_(0)]^(2-1)) RARR t_(1//2)=1/(k[A_(0)])`


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