Which is the true regarding rate of formation of haloforms?

Options

A. Rate of formation of `"CHF"_(3)` is highest
B. Rate of formation of `"CHI"_(3)` is highest
C. Rate of formation of all are equal
D. Rates cannot be related

Answer

To solve the question regarding the rate of formation of haloforms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Haloforms**:
- Haloforms are compounds that are produced when a methyl ketone undergoes halogenation in the presence of a base. The general formula for haloforms is CHX3, where X represents a halogen.

2. **Identifying the Reaction**:
- The reaction involves the halogenation of a methyl ketone (RCOCH3) in the presence of a base (like NaOH). The base helps in forming an enolate ion from the methyl ketone.

3. **Formation of Enolate Ion**:
- The methyl ketone reacts with the base to form an enolate ion (RCOC(=O)O⁻). This enolate ion is crucial for the subsequent halogenation step.

4. **Halogenation Process**:
- The enolate ion reacts with halogen (X2) to produce the haloform (CHX3) and regenerate the ketone. The reaction can be summarized as:
\[ RCOCH3 + X2 \xrightarrow{\text{Base}} RCOC(=O)O⁻ + CHX3 \]

5. **Rate of Reaction**:
- The rate of formation of haloforms depends primarily on the concentration of the enolate ion. It is important to note that the rate does not depend on the concentration of the halogen (X2). This means that the reaction rate is independent of the halogen used.

6. **Conclusion**:
- Since the rate of formation of haloforms is independent of the halogen concentration, the correct statement regarding the rate of formation of haloforms is that the rate of formation of all haloforms is equal.

### Final Answer:
The true statement regarding the rate of formation of haloforms is that the rate of formation of all haloforms is equal.

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