Question

According to law of mass action rate of a chemical reaction is proportional to:

• A. concentration of reactants
• B. molar concentration of reactants
• C. concentration of products
• D. molar concentration of products

Answer 1

Answer: (B)

molar concentration of reactants

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

Example: For reaction $aA+bB\rightleftharpoons cC+dD$ the rate of reaction is given as,

$rate\propto \left[A{]}^a\right[B{]}^b$