Name a single hydrocarbon which is used to prepare polyvinyl chloride (PVC).

Explanation

To answer the question, "Name a single hydrocarbon which is used to prepare polyvinyl chloride (PVC)," we can follow these steps:

### Step 1: Understand the Composition of PVC
Polyvinyl chloride (PVC) is a polymer, which means it is made up of repeating units derived from a smaller molecule known as a monomer.

**Hint:** Remember that polymers are formed from monomers through a process called polymerization.

### Step 2: Identify the Monomer of PVC
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