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Zero Order Reaction

A substance h...

Question

A substance having rate constant $k$ and initial concentration $a$ reacts according to zero order kinetics. What will be the time for the reaction to go to completion?

A

\frac{a}{k}

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B

\frac{k}{a}

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C

\frac{a}{2 k}

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D

\frac{2 k}{a}

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Solution

The correct option is A $\frac{a}{k}$
For zero order reaction, $t = \frac{a - a t}{k}$
where at=concentration of reactant at time t
For completion of reaction, at=0
$t = \frac{a}{k}$

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