In Reed’s reaction alkane reacts with `Cl_(2) and SO_(2)` in the presence of -

Options

A. UV light
B. IR light
C. Visible light
D. Dark

Answer

To solve the question regarding Reed's reaction, we will break down the steps involved in the reaction of alkanes with chlorine (Cl₂) and sulfur dioxide (SO₂).

### Step-by-Step Solution:

1. **Understanding Reed's Reaction**:
Reed's reaction involves the reaction of alkanes with chlorine gas (Cl₂) in the presence of sulfur dioxide (SO₂). This reaction is significant in organic chemistry for the halogenation of alkanes.

2. **Reactants**:
- **Alkane**: This is a saturated hydrocarbon with the general formula CₙH₂ₙ₊₂.
- **Chlorine (Cl₂)**: A diatomic molecule that acts as a halogenating agent.
- **Sulfur Dioxide (SO₂)**: This acts as a catalyst in the reaction.

3. **Reaction Conditions**:
The reaction typically requires the presence of light or heat to initiate the halogenation process. This is because the reaction involves the formation of free radicals.

4. **Mechanism of the Reaction**:
- **Initiation**: The Cl₂ molecule dissociates into two chlorine radicals (Cl•) under the influence of heat or light.
- **Propagation**: The chlorine radicals react with the alkane to form alkyl radicals and hydrogen chloride (HCl).
- **Termination**: The alkyl radicals can then react with another Cl₂ molecule to form the chlorinated alkane.

5. **Product Formation**:
The main products of the reaction are chlorinated alkanes (alkyl chlorides). The specific product formed depends on the structure of the alkane and the reaction conditions.

### Final Reaction Equation:
The general form of Reed's reaction can be represented as:
\[ \text{R-H} + \text{Cl}_2 \xrightarrow{\text{SO}_2} \text{R-Cl} + \text{HCl} \]
Where R-H represents the alkane and R-Cl represents the chlorinated alkane.