Question

For the first order reaction $A \rightarrow B$, the half life is $30 min$ The time taken for $75 \%$ completion of the reaction is min (Nearest integer) Given : $\log _g 2=03010$ $\log 3=04771$ $\log 5=06989$

Answer 1

The correct answer is 60.
t1/2​=T50​=30min
T75​=2t1/2​=30×2=60min