Question

The law of mass action states that at a constant temperature, the rate of a chemical reaction is proportional to the _____ of the reacting substances.

• A. total mass
• B. molecular weights
• C. active masses
• D. None of these

Answer 1

The correct option is C active masses

The law of maass action states that the rate of chemical reaction is directly proportional to the product of the molar concentration of reactants raised to their stoichiometric coefficient.

For example
for the reaction $aA+bB\rightleftharpoons cC+dD$
Rate of reaction $\alpha [A{]}^a\times [B{]}^b$
where [A] and [B]
are the active masses.
Hence option having active masses as the answer is correct.