Question

(A) Half-life of a first order reaction is independent of the initial concentration of reactant.
(R) $t_{1/2}$ (first order) $=\tau /1.44$
where, $\tau =$average life.

• A. Both (R) and (A) are true and reason is the correct explanation of assertion
• B. Both (R) and (A) are true but reason is not correct explanation of assertion
• C. Assertion (A) is true but reason (R) is false
• D. Assertion (A) and reason (R) both are false
• E. Assertion (A) is false but reason (R) is true

Answer 1

The correct option is A Both (R) and (A) are true and reason is the correct explanation of assertion

Half-life of a first order reaction is independent of the initial concentration of reactant. Becuase $t_{1/2}$ (first order) $=\tau /1.44$
where, $\tau =$average life.
So Both (R) and (A) are true and reason is the correct explanation of assertion.
Hence option A is correct.