JEE Main 2022 Chemistry question
For a first order reaction, the time required for completion of 90% reaction is 'x' times the half life of the reaction. The value of 'x' is (Given: ln 10 = 2.303 and log 2 = 0.3010)
Answer: (3)
Solution
For a first order reaction = 0.693/k and = (2.303/k)log 10 = 2.303/k. So = 2.303/0.693 = 3.32.