A chemical reaction: A → P follows the first order kinetics and the rate of reaction measured after 10 min and 30 min from beginning were found out to be 0.6 mol L –1 min –1 and 0.4 mol L –1 min –1 respectively. The half– life of this reaction in minutes is nearest to the integer ______. [Take ln (3) =1.1 and ln ( 2) = 0.7 ]
