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The time for half-life period of a certa...

The time for half-life period of a certain reaction, `A rarr` products is `1 h`. When the initial concentration of the reactant `'A'` is `2.0 "mol" L^(-1)`, how much time does it take for its concentration to come from `0.50` to `0.25 "mol" L^(-1)`, if it is zero order reaction ?

A

(a) `4 hr`

B

(b) `0.5 hr`

C

(c ) `0.25 hr`

D

(d) `1 hr`

Text Solution

Verified by Experts

The correct Answer is:
c
For a zero order reaction, `K=x/t`
`:. K=([A]_(0))/(2xxt_(1//2))=2/(2xx1)=1.0 mol. L^(-1). Hr^(-1)`
`t=1/K{[A]_(0)-[A]}=1/1.0(0.50-0.25)=0.25 hr`
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