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If t(0.5) of a first order reaction, PCl...

If `t_(0.5)` of a first order reaction, `PCl_(5) to PCl_(3) + Cl_(2)` is 10 minutes then the time in which the concentration of `PCl_(5)` reduces to 10% of the original is

A

26 min

B

33 min

C

71 min

D

90 min

Text Solution

Verified by Experts

The correct Answer is:
B
`k=(0.693)/(10)=0.0693 "min"^(-1)`
`t=(2.303)/(0.0693)"log"(1)/(0.1)=(2.303)/(0.0693)=33` min
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