Assertion Two different radioactive substances have initially same number of nuclei. Their decay constants are `lamda_(1)and lamda_(2)(ltlamda_(1)).` Then, initially first radioactiv substance decays at faster rate.
Reason Half-life of first radioactive substance is less.

Options

A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B. If both Assertion and Reason are true but Reason are true but Reason is not correct explanation of Assertion.
C. If Assertion is true but Reason is false.
D. If Assertion is false but Reason is true.

Answer

A

Explanation

(a) `t_(1//2) =(0.693)/(lamda ) implies _(1//2) prop 1//lamda implies lamda prop(1)/(T_(1//2))`