Starting with one mole of a compound X it is found that the reaction is 3/4 complete in 1 min . What is the rate constant if the reaction follows first order ?

Options

A. `0.213 sec^(-1)`
B. `2.31 sec^(-1)`
C. `0.0231 sec^(-1)`
D. `2.31 xx10^(-3) sec^(-1)`

Answer

C

Explanation

(C ) `t_(3//4) = (2.303)/(k)` log 4
`:. K = (2.303)/(60 sec) "log" 4 = (2.303xx0.602)/(60)`
`=0.0231 sec^(-1)`