`I_(2)(g)+Br_(2_((g)))hArr2IBr_((g))` The rate of both the forward and back ward reaction increased by irradiation of the system with white light. So correct statement

Options

A. Light is not a catalyst
B. Light is catalyst for forward reaction
C. Light is catalyst for backward reaction
D. Light is catalyst for both forward and backward reaction.

Explanation

To solve the question regarding the reaction \( I_2(g) + Br_2(g) \rightleftharpoons 2IBr(g) \) and the effect of white light on the rate of both the forward and backward reactions, we will analyze the role of light in this context.

### Step-by-Step Solution:

1. **Understanding the Reaction**:
- The given reaction involves iodine (\( I_2 \)) and bromine (\( Br_2 \)) reacting to form iodine monobromide (\( IBr \)).
- The reaction is reversible, meaning it can proceed in both the forward direction (producing \( IBr \)) and the backward direction (producing \( I_2 \) and \( Br_2 \)).

2. **Effect of White Light**:
- The problem states that the rate of both the forward and backward reactions increases upon irradiation with white light.
- This suggests that light is influencing the reaction dynamics.

3. **Role of Light**:
- Light can provide energy to the molecules involved in the reaction. In this case, it can excite the molecules to a higher energy state.
- However, light itself is not a catalyst. A catalyst is a substance that increases the rate of a reaction without being consumed in the process.

4. **Analyzing the Statements**:
- We need to evaluate the provided statements regarding the role of light:
1. Light is not a catalyst.
2. Light is a catalyst for the forward reaction.
3. Light is a catalyst for the backward reaction.
4. Light is a catalyst for both reactions.

5. **Conclusion**:
- Since light increases the rate of the reactions but does not get consumed or change the overall reaction mechanism, it cannot be classified as a catalyst.
- Therefore, the correct statement is: **Light is not a catalyst.**

### Final Answer:
The correct statement is: **Light is not a catalyst.**

---