In the first order reaction the concentration of the reactants is r...

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In the first order reaction the concentration of the reactants is reduced to \( 25 \% \) in one hour.
The half life period for the reaction
(A) \( 2 \mathrm{hrs} \)
(B) \( 4 \mathrm{hrs} \)
(C) \( 1 / 2 \mathrm{hrs} \)
(D) \( 1 / 4 \mathrm{hrs} \)
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