Question

What you can say about the rate of the reaction?

• A. The rate of the reaction is minimum when the reaction starts, then the rate increases.
• B. The rate of the reaction is maximum when the reaction starts, then the rate remains constant.
• C. The rate of the reaction is maximum when the reaction starts, then the rate decreases.
• D. The rate of the reaction is minimum when the reaction starts, then the rate remains constant.

Answer 1

Answer: (C)

The rate of the reaction is maximum when the reaction starts, then the rate decreases.

The reaction rate is largest when the reaction starts, then the reaction rate decreases. In the beginning, the concentration of reactants is high. Due to this, the reaction rate is the largest.

With the progress of time, the reactants are converted into products. Due to this, the reactant concentration decreases. Hence, the rate of the reaction also decreases.