Question

The unit of rate constant for a zero order reaction is

• A. \( \text{mol L}^{-1} \text{s}^{-1} \)
• B. \( \text{L mol}^{-1} \text{s}^{-1} \)
• C. \( \text{L}^2 \text{mol}^{-2} \text{s}^{-1} \)
• D. \( \text{s}^{-1} \)

Hint:

In a zero-order reaction, the rate constant has units of concentration per time.

Answer 1

The Correct Option is A

For a zero-order reaction, the rate law is given by \( \text{Rate} = k \), where \( k \) is the rate constant. Since the rate of reaction is independent of the concentration of reactants in zero-order reactions, the unit of the rate constant is \( \text{mol L}^{-1} \text{s}^{-1} \).

Step 2: Conclusion.
The correct unit for the rate constant in a zero-order reaction is \( \text{mol L}^{-1} \text{s}^{-1} \), corresponding to option (a).