Question

In a batch reactor, the reaction rate is:

• A. Constant
• B. Decreases with time
• C. Increases with time
• D. Zero

Hint:

In batch reactors, always remember that the reaction rate decreases as reactants are consumed during the reaction.

Answer 1

The Correct Option is B

In a batch reactor, the concentration of reactants decreases over time as the reaction proceeds. Since the reaction rate depends on the concentration of reactants, it will decrease as the concentration of reactants decreases. Therefore, the reaction rate decreases with time, and the correct answer is: \[ \boxed{(B) \, \text{Decreases with time}} \]