Statement 1: In a zero order reaction, if the concentration of the reactant is doubled, the half-life period is also doubled. Statement 2: For a zero-order reaction, the rate of the reaction is independent of initial concentration.
A
Statement 1 is True, statement 2 is True, statement 2 is a correct explanation of statement 1.
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B
Statement 1 is True, statement 2 is True, statement 2 is not a correct explanation of statement 1.
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C
Statement 1 is true, Statement 2 is False.
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D
Statement 1 is False, Statement 2 is True.
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Solution
The correct option is B Statement 1 is True, statement 2 is True, statement 2 is not a correct explanation of statement 1. For a zero order reaction, the expression for the half life period is t12=[Ao]2k. Thus half life period is directly proportional to the initial concentration. When the concentration of the reactant is doubled, the half-life period is also doubled. Hence, the statement 1 is true. The rate of a zero order reaction is independent of the concentration of the reaction. The reaction proceeds at constant rate throughout. Hence, statement 2 is True.