For a zero order reaction, The rate becomes double when the concentration of reactant is doubled.
T or F

Answer

To determine whether the statement "For a zero order reaction, the rate becomes double when the concentration of reactant is doubled" is true or false, we can analyze the characteristics of zero order reactions step by step.

### Step-by-Step Solution:

1. **Understanding Zero Order Reactions**:
- In a zero order reaction, the rate of reaction is constant and does not depend on the concentration of the reactants. This means that the rate remains the same regardless of how much reactant is present.

2. **Rate Equation for Zero Order Reactions**:
- The rate of a zero order reaction can be expressed mathematically as:
\[ \text{Rate} = k \]
where \( k \) is the rate constant.

3. **Effect of Concentration Change**:
- If we denote the concentration of the reactant as \( [A] \), for a zero order reaction, the rate does not change with changes in \( [A] \).
- Therefore, even if the concentration of the reactant is doubled (i.e., if \( [A] \) changes from \( a \) to \( 2a \)), the rate remains:
\[ \text{Rate} = k \]
- This indicates that the rate is independent of the concentration of the reactant.

4. **Conclusion**:
- Since the rate does not change when the concentration of the reactant is doubled, the statement "the rate becomes double when the concentration of reactant is doubled" is **false**.

### Final Answer:
The statement is **False**.