Westron is the solvent obtained by the reaction of chlorine with

Options

A. Ethylene
B. Ethyne
C. Ethane
D. Methane

Explanation

To determine the solvent Westron, which is obtained by the reaction of chlorine, we need to analyze the reactions of chlorine with various hydrocarbons. Westron is chemically known as tetrachloroethane. Let's break down the process step by step.

### Step 1: Identify the Structure of Westron
Westron is tetrachloroethane, which has the chemical formula C2H2Cl4. This indicates that it has two carbon atoms and four chlorine atoms.

**Hint:** Remember that the prefix "tetra-" means four, indicating the number of chlorine atoms in the compound.

### Step 2: Analyze the Hydrocarbons
We will consider the following hydrocarbons for the reaction with chlorine:
1. Ethylene (C2H4)
2. Ethyne (C2H2)
3. Ethane (C2H6)
4. Methane (CH4)

**Hint:** Focus on the type of bonds present in each hydrocarbon, as this will determine the type of reaction that can occur with chlorine.

### Step 3: Reaction of Ethylene with Chlorine
Ethylene (C2H4) has a double bond. When chlorine (Cl2) reacts with ethylene, it undergoes an addition reaction:
- The double bond between the two carbon atoms breaks, and two chlorine atoms are added.
- This results in the formation of dichloroethane (C2H4Cl2), not tetrachloroethane.

**Hint:** Addition reactions can only add a limited number of chlorine atoms based on the number of unsaturated bonds.

### Step 4: Reaction of Ethyne with Chlorine
Ethyne (C2H2) has a triple bond. The reaction with chlorine would involve breaking the triple bond:
- The first addition of Cl2 results in a dichloro compound, and a second addition can lead to the formation of tetrachloroethane.
- Therefore, this reaction can yield tetrachloroethane.

**Hint:** Multiple unsaturations allow for more chlorine atoms to be added through successive addition reactions.

### Step 5: Reaction of Ethane with Chlorine
Ethane (C2H6) has only single bonds. When reacted with chlorine in the presence of UV light, it undergoes a substitution reaction:
- One hydrogen atom is replaced by a chlorine atom, resulting in the formation of ethyl chloride (C2H5Cl).
- This does not lead to the formation of tetrachloroethane.

**Hint:** Substitution reactions do not increase the number of chlorine atoms beyond the number of hydrogen atoms replaced.

### Step 6: Reaction of Methane with Chlorine
Methane (CH4) also has only single bonds. Similar to ethane, when reacted with chlorine in the presence of UV light, it undergoes a substitution reaction:
- One hydrogen atom is replaced by a chlorine atom, forming methyl chloride (CH3Cl).
- This does not yield tetrachloroethane.

**Hint:** Like ethane, methane cannot produce tetrachloroethane due to the lack of unsaturation.

### Conclusion
The only hydrocarbon that can react with chlorine to produce Westron (tetrachloroethane) is ethyne (C2H2). Therefore, the solvent Westron is obtained by the reaction of chlorine with ethyne.

**Final Answer:** Westron is the solvent obtained by the reaction of chlorine with ethyne (C2H2).