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The correct difference between first and second order reactions is that ...........

Answer»

A FIRST order reaction can be cataylsed , a SECOND order reaction cannot b cataysed .
The half life of a first order reaction does not depend on `[A_0]` , the half life of a second order reaction odes 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 reaction does depend on reactant CONCENTRATION , 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))`
`t_(1//2)=1/(k[A_0])`


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