Calculate the half life of a first order reaction from their rate constants given below `:`
`a. 200s^(-1)`,`b. 2 mi n^(-1)`,`c.4years^(-1)`

Explanation

(i) Half life , `t_((1)/(2)) = (0.693)/(k)`
`= (0.693)/(200 s^(-1))`
=`3.47 xx 10^(-3)s` (approximately)
(ii) Half life , `t_((1)/(2)) = (0.693)/(k)`
= `(0.693)/(4 "years"^(-1))`
= `0.173` years (approximately)