Question

The stoichiometry coefficient in rate of reaction is same for average rate as well as instantaneous rate of reaction

• A. True
• B. False

Answer 1

The correct option is A True

The change in molar concentration of either reactants or products in unit time is called as average rate.

Let ‘Δc’ is the decrease in concentration of reactants in a small interval of time ‘Δt’ then:

$-\frac{\Delta c}{\Delta t}$ is the average rate with respect to reactant concentration(negative sign is used to make the rate positive, since the concentration of reactants decreases with time)

If ‘Δx’ is the increase in concentration of products in a small interval of time ‘Δt’ then:

$\frac{\Delta x}{\Delta t}$ is average rate with respect to product concentration ( positive sign is used since there is increase in the concentration of products during the reaction )

The change in molar concentration of either reactants or products at an instant of time (or in infinitesimally small interval of time) is called as instantaneous rate.

So stoichiometry coefficient in rate of reaction is same for average rate as well as instantaneous rate of reaction.