Question

If the rate law of a reaction is Rate $= K[A]^2 [B]^0$, then what will be the order of the reaction?

• A. Zero order
• B. First order
• C. Second order
• D. Third order

Hint:

Any concentration term raised to the power zero equals 1. So, $[B]^0 = 1$ and does not affect the rate of reaction.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The order of a reaction is the sum of the powers (exponents) of the concentration terms in the rate law equation.
Step 2: Detailed Explanation:
Given rate law:
\[ \text{Rate} = K[A]^2[B]^0 \] Here,
Order with respect to $A = 2$
Order with respect to $B = 0$
Total order of the reaction $= 2 + 0 = 2$
Step 3: Final Answer:
The total order of the reaction is 2. Hence, it is a Second order reaction.