Question

Which o f the following statements is correct?

• A. The rate of a reaction decreases with passage of time as the concentration of reactants decreases.
• B. The rate o f a reaction is same at any time during the reaction.
• C. The rate of a reaction is independent of temperature change.
• D. The rate o f a reaction decreases with increase in concentration of reactant $(s)$.

Answer 1

Answer: (A)

According to rate law expression, Rate $\propto$ $\left[R\right]$ Thus, rate of a reaction decreases with passage of time as the concentration of reactants decreases.