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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 hour . 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 a zero order reaction ?

A

0.25 h

B

1 h

C

4 h

D

0.5 h

Text Solution

Verified by Experts

The correct Answer is:
A
(A) For zero order reaction
`t_(1//2) = ([A]_(0))/(2K)`
`k = ([A]_(0))/(2t_(1//2))= (2)/(2xx1)=1 "mol L"^(-1) hr^(-1)`
`k = ([A]_(0)-[A])/(t)`
`t= ([A]_(0)-[A])/(k) = (0.50-25)/(1) = 0.25 ` hr
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