1.

Assertion. For a first order reaction, the concentration of the reactant decreases exponentially with time. Reason. Rate of reaction at any time depends upon the concentration of the reactant at that time.

Answer»

If both assertion and reason are true and reason is the true EXPLANATION of the assertion.
If both assertion and reason AE true but reason is not the true explanation of the assertion.
If assertion is true, but reason is false.
If both assertion and reason are false.

Solution :CORRECT explanation. `[A]=[A]_(0)E^(-kt)`.


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