Question

For the reaction 2A₂(g) + ¼X(g) → 2A₂X(g),If the volume is increased to double its value by decreasing the pressure on it. If the reaction is first order with respect to X and second order with respect to A2, the rate of reaction will:

• A. Decrease by eight times of its value
• B. Increase by eight times of its value
• C. Increase by four times of its value
• D. Remain unchanged

Answer 1

Answer: (A)

Decrease by eight times of its value

Answer 2

When the volume is doubled, the concentration of gases will halve, meaning that both [A$_2$] and [X] will be halved, and the rate decreases by eight times.