1.

For a first order reaction A to Bthe reaction rate at reactant concentration of 0.01 M is found to be 2.0 xx 10^(-5) mol L^(-1) s^(-1) . The half life period of the reaction is

Answer»

220 s
30 s
300 s
347 s

SOLUTION :R = k[A]
`2 xx 10^(-5) = k xx 10^(-2)`
`k= 2 xx 10^(-3) sec^(-1)`
`t_(1//2) = (0.693)/(k) = (0.693)/(2 xx 10^(-3)) = (693)/(2) = 347` sec .


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