A zero order reaction is one whose rate is independent of

Options

A. temperature of the reaction
B. presence of light
C. concentration of the reactants
D. the material of the vessel in which the reaction is carried out

Explanation

To solve the question regarding a zero-order reaction, we need to understand the characteristics of such reactions. Here’s a step-by-step solution:

### Step 1: Understand Zero-Order Reactions
A zero-order reaction is defined as a reaction where the rate of reaction is constant and does not change with the change in concentration of the reactants.

### Step 2: Rate Law Expression
For a zero-order reaction, the rate law expression can be written as:
\[ \text{Rate} = k \]
where \( k \) is the rate constant. This indicates that the rate of the reaction is independent of the concentration of the reactants.

### Step 3: Identify What the Rate is Independent Of
Since the rate is constant, it does not depend on the concentration of the reactants. Therefore, the rate is independent of the concentration of reactants.

### Step 4: Analyze the Options
Given the options in the question, we need to identify which one states that the rate is independent of the concentration of reactants.

- **Temperature**: The rate can depend on temperature.
- **Presence of Light**: Some reactions may depend on light, especially photochemical reactions.
- **Concentration of Reactants**: This is the correct answer as the rate is independent of this.
- **Material of the Vessel**: This may affect the reaction but is not a primary factor in defining the order of the reaction.

### Conclusion
The correct answer to the question "A zero-order reaction is one whose rate is independent of" is **the concentration of reactants**.

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