Calculate the half life of the first order reaction from their rate constant given as
a) `200s^(-)`
b) `2min^(-1)`
c) 4 `"year"^(-1)`.

Explanation

a) Half life period `(t_(1//2)) = 0.693/k = 0.693/(200s^(-1))= 3.46 xx 10^(-3)s`
b) Half life period `(t_(1//2)) = 0.693/(2min^(-1)) = 0.346 min = 3.46 xx 10^(-1) min`
c) Half life peroid `(t_(1//2))=0.693/k = 0.693/(4"year"^(-1))= 1.73 xx 10^(-1)` year