Order of a reaction can have ______ values .

Options

A. Positive values
B. Whole number values
C. Fractional values
D. All of the above

Answer

To determine the possible values for the order of a reaction, we can follow these steps:

### Step-by-Step Solution:

1. **Definition of Order of Reaction**:
The order of a reaction is defined as the sum of the powers of the concentration terms in the rate law expression. It is determined experimentally.

2. **Rate Law Expression**:
For a reaction of the form \( A + B \rightarrow P \), the rate law can be expressed as:
\[ \text{Rate} = k[A]^m[B]^n \]
where \( k \) is the rate constant, \( [A] \) and \( [B] \) are the concentrations of the reactants, and \( m \) and \( n \) are the orders with respect to each reactant.

3. **Calculating the Order**:
The overall order of the reaction is given by:
\[ \text{Order} = m + n \]
Here, \( m \) and \( n \) can take various values.

4. **Possible Values for m and n**:
- **Positive Values**: \( m \) and \( n \) can be positive integers (e.g., 1, 2, 3, ...).
- **Whole Numbers**: This includes zero (e.g., 0, 1, 2, ...).
- **Fractional Values**: \( m \) and \( n \) can also be fractional (e.g., 0.5, 1.5).

5. **Conclusion**:
Therefore, the order of a reaction can have:
- Positive values
- Whole number values
- Fractional values
This leads us to conclude that the order of a reaction can indeed take on all of the above values.

### Final Answer:
The order of a reaction can have **all of the above values** (positive, whole number, and fractional).

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