For a zero order reaction will the molecularity be equal to zero ? Explain.

Explanation

**Step-by-Step Solution:**

1. **Understanding Zero-Order Reactions:**
- A zero-order reaction is defined as a reaction whose rate is independent of the concentration of the reactants. This means that the rate of reaction remains constant over time, regardless of how much reactant is present.

2. **Definition of Molecularity:**
- Molecularity is defined as the number of reactant molecules that collide to produce a reaction. It is a theoretical concept that indicates the number of species involved in the rate-determining step of the reaction.

3. **Molecularity in Zero-Order Reactions:**
- In a zero-order reaction, even though the rate does not depend on the concentration of the reactants, there are still reactant molecules present that are involved in the reaction. Therefore, the molecularity cannot be zero.

4. **Conclusion:**
- Since molecularity represents the number of reactants participating in the reaction, it must be a positive integer (1, 2, 3, etc.). Thus, for a zero-order reaction, the molecularity is not zero; it can be 1 or more, depending on the specific reaction mechanism.

**Final Answer:**
No, the molecularity of a zero-order reaction cannot be zero. Molecularity represents the number of reactant molecules involved in the reaction, which must always be a positive integer.

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