The rate of reaction is equal to the specific rate constant, when:
Correct answer: A. Concentration of reactants collectively is unity
- A. Concentration of reactants collectively is unity
- B. Concentration of each of the reactants is unity
- C. Either a or b
- D. None of these
Explanation
When the concentration of all the reactants collectively is unity, the rate of reaction is equal to the specific rate constant. This is because in the rate equation:Rate = k [A]^m [B]^nwhere [A] and [B] are the concentrations of the reactants, and m and n are the reaction orders.If the collective concentration of the reactants is unity, meaning [A] * [B] = 1, then the rate equation simplifies to:Rate = kThis shows that when the concentration of the reactants collectively is unity, the rate of reaction is equal to the specific rate constant (k).Therefore, the correct answer is a) Concentration of reactants collectively is unity.
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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