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In the following question, a statement of assertion is given and a corresponding statement of reason is given just below it. Of the statements, mark the correct answer as –
Assertion (A): Radioactive decay follows first order kinetics.
Reason (R ): The half life of a first order reaction depends upon the rate constant.

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If both A and R are true and R is the correct explanation of A

If both A and R are true but R is not the correct explanation of A

If A is true but R is false

Both A & R are false

answer is B.

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Detailed Solution

Since the rate of radioactive decay $(- \frac{d N}{d t}) = λ {[N]}^{- 1} .$ Thus the reaction follows first order kinetics. And the half life of a reaction depends upon rate constant(k) which is a function of temperature.

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