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  4. Assertion: The rate of a reaction sometimes does not depend on concentrations. Reason: Lower the activation energy, faster is the reaction.

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Q. Assertion : The rate of a reaction sometimes does not depend on concentrations.
Reason : Lower the activation energy, faster is the reaction.

Chemical Kinetics

Solution:

Some reactions, like psendo first order reaction and zero order reactions doesn't depend on concentration of reactants. Activation energy is barries for initiation of reaction. So, Lower the activation energy, faster is the reaction.