Question

For a reaction \(A\rightarrow\) Product, the rate constant is \(6.09\times 10^{-3}\) \(\text{hour}^{-1}\). What is the order of the reaction?

• A. Zero
• B. \(1.5\)
• C. \(1\)
• D. \(2\)

Hint:

The unit of the rate constant depends on the order, and a unit of per time means first order.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
For an \(n\)th order reaction the unit of \(k\) is \((\text{mol L}^{-1})^{1-n}\ \text{time}^{-1}\).

Step 2: Compare units
Zero order has \(\text{mol L}^{-1}\text{ time}^{-1}\).
First order has \(\text{time}^{-1}\).
Second order has \(\text{L mol}^{-1}\text{ time}^{-1}\).

Step 3: Match
The given unit is \(\text{hour}^{-1}\), which is first order, option (C).

Final Answer:
The reaction is of first order. \[ \boxed{\text{(C) }1} \]