Question

75%of a first order reaction is completed in 32 min . 50% of reaction would have been completed in​

Answer 1

Concept :- For a first order reaction ,

$t_{75\%} = 2 t_{50\%}$

Solutions

Given,

$t_{75\%} = 32 \: min \\ thus \: t_{50\%} = \frac{32}{2} = 16 \: min$

Answer 2

Answer: 16 minutes

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