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Q.
Half life period of 2nd order reaction is
Chemical Kinetics
Solution:
$t_{1/2} \propto \frac{1}{[a_0]^{n-1}}$where n = order of reaction
If n=2 then $t_{1/2} \propto \frac{1}{[a_0]^{2-1}}\,or\,t_{1/2}\propto \frac{1}{[a_0]}$