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When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction is:
A
Zero
B
First
C
Second
D
More than zero but less than first
Detailed Solution
For a first order reaction, $t_{1/2} = \frac{0.693}{k}$, which is independent of the initial concentration of the reactant.
So the reaction is first order.
So the reaction is first order.