A first order reaction is 20% complete i...

A first order reaction is 20% complete in 10 min. Calculate the specific rate constant of the reaction.

A

`0.223 "min"^(-1)`

B

`0.0223 "min"^(-1)`

C

`2.23 "min"^(-1)`

D

`22.3 "min"^(-1)`

Verified by Experts

`log""([A]_(1))/([A]_(0)) = (k)/(2.303) t` i.e, log `0.8 =-(k)/(2.303)` (10 min) or `k = (2.303)/(10 " min") log (0.8) = 0.0223 "min"^(-1)`

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