The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances. This is the

The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances. This is the Correct Answer None of these

The given statement is law of mass action which states that the rate of chemical reaction is directly proportional concentration of species involved in reaction.
Concentration involved in reaction $$=$$ active mass.
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