Question

Just before a reversible reaction attains equilibrium, it is found that:

• A. the velocity of both forward reaction and backward reaction is also increasing
• B. the velocity of the forward reaction is decreasing and that of the backward reaction is also increasing
• C. the velocity of both forward and backward reaction is decreasing
• D. none of the above

Answer 1

The correct option is B the velocity of the forward reaction is decreasing and that of the backward reaction is also increasing

Before attaining the equilibrium, the rate of the forward reaction decreases due to a decrease in concentration of reactants with time and the rate of backward reaction increases due to an increase in the concentration of products with time.