The statement that is NOT correct is

Options

A. 20 min
B. 15 min
C. 3 hr
D. 30 min

Answer

A

Explanation

For a first order reaction : ,
` k = (2.303)/t log. ([A]_(0))/([A]) = (2.303)/(60) log. (100)/(12.5) = 0.0346 "min"^(-1`
Now ` t_(1//2) = (0.693)/k = (0.693)/(0.0346) = 20 ` min