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The half life period of a first order re...

The half life period of a first order reaction is 60 min. What percentage will be left after 240 min.

A

0.175

B

0.15

C

0.125

D

0.1

Text Solution

Verified by Experts

The correct Answer is:
c
`n = (45)/(15) = 3` = No. of half lives
`N = N_(0) ((1)/(2))^(n) = 100 xx ((1)/(2))^(3) = 12.5%`
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