Question

Experiments on the reaction A → Products Show the rate constant to be k = 2.7...

Experiments on the reaction

A → Products

Show the rate constant to be k = 2.7 mol-1 L1 s-1. Which of the following statements about the reaction is/are correct?

1. Overall, the reaction is 1st order.

2. When the initial concentration of A is doubled at constant temperature, the value of k remains unchanged.

3. Addition of a catalyst decreases the activation energy.

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Answer #1

1. Not correct : unit of first order is s-1. The reaction is not first order as unit of rate constant is mol-1 L1 s-1. Its a second order reaction.

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2.Not correct When the initial concentration of A is doubled at constant temperature, the value of k will change.

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3. Correct : Addition of catalyst decreases tghe activation energy. Hence rate of reaction increases.

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