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50 % of first order reaction gets comple...

50 % of first order reaction gets completed in 16 minutes. What fraction of the reaction would occur in 32 minutes :

A

`66%`

B

`75% `

C

`25% `

D

`90% `

Text Solution

Verified by Experts

The correct Answer is:
B
Hint : Number of half life periods = `32//16 = 2`
Reactant left after two half lives = `[R]_0//2^2 [R]_0//4` Reaction completed = `[R]_0 - [R]_0//4 = 3 [R]_0//4` percentage reaction completed = 75%
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