It is necessary to use ..................... in the iodination of alkane -

Options

A. Alcohol
B. Oxidant
C. Benzene
D. Reductant

Answer

To answer the question regarding what is necessary to use in the iodination of alkane, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Iodination**: Iodination refers to the process of adding iodine (I2) to an alkane (R-H) to form an alkyl iodide (R-I). This reaction is a substitution reaction where one of the hydrogen atoms in the alkane is replaced by an iodine atom.

2. **Identifying the Byproduct**: During the iodination reaction, hydrogen iodide (HI) is produced as a byproduct. HI is a strong reducing agent, which means it can convert the alkyl iodide (R-I) back to the alkane (R-H).

3. **The Problem with HI**: The formation of hydrogen iodide (HI) is problematic because it can reverse the iodination reaction, converting the desired product (R-I) back to the starting material (R-H). Therefore, we need to find a way to prevent the formation of HI.

4. **Using an Oxidizing Agent**: To prevent the formation of hydrogen iodide, we can use an oxidizing agent. Oxidizing agents help to stop the reduction process that HI would cause. Examples of oxidizing agents that can be used include HGO (Mercury(II) oxide), HIO3 (Iodic acid), and dilute nitric acid.

5. **Conclusion**: Therefore, in the iodination of alkane, it is necessary to use an oxidizing agent to prevent the formation of hydrogen iodide, which would otherwise reverse the reaction.

### Final Answer:
It is necessary to use **an oxidizing agent** in the iodination of alkane.

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