Assertion (A) : An order with respect to any reactant or Product can be zero, poistive, negative, and fractional. Reason (R ): Rate cannot decrease with increase in the concentration of a reactant or Product.

Options

A. If both `(A)` and `(R )` are correct, and `(R )` is the correct explnation of `(A)`.
B. If both `(A)` and `(R )` are correct, but `(R )` is noth the correct explanation of `(A)`.
C. If `(A)` is correct, but `(R )` is incorrect.
D. If `(A)` is incorrect, but `(R )` is correct.

Explanation

To solve the question regarding the assertion and reason statements about reaction order and rate, we will break it down into clear steps.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that the order with respect to any reactant or product can be zero, positive, negative, or fractional.
- **Analysis**: This statement is true. The order of a reaction is determined experimentally and can indeed take on various values. For example:
- Zero order means the rate is independent of the concentration of that reactant.
- Positive order indicates that an increase in concentration leads to an increase in the rate.
- Negative order implies that an increase in concentration leads to a decrease in the rate.
- Fractional order can occur in complex reactions.

2. **Understanding the Reason (R)**:
- The reason states that the rate cannot decrease with an increase in the concentration of a reactant or product.
- **Analysis**: This statement is false. While it is generally true that increasing the concentration of a reactant often increases the rate of reaction, there are exceptions. For example, in some reactions, increasing the concentration of a product can lead to a decrease in the rate of reaction due to reverse reactions or equilibrium shifts.

3. **Relation Between Assertion and Reason**:
- The assertion discusses the possible values of reaction order, while the reason discusses the relationship between concentration and rate.
- **Analysis**: There is no direct relationship between the two statements. The validity of the assertion does not depend on the truth of the reason.

4. **Conclusion**:
- Since the assertion is true and the reason is false, we conclude that the correct answer is that the assertion is correct, but the reason is incorrect.

### Final Answer:
- Assertion (A) is true.
- Reason (R) is false.
- Therefore, the correct option is **B**: Assertion is correct, Reason is incorrect.