X is a thermoplastic. It does not allow electricity to pass through it. It is used to make coverings around electrical wires, floor tiles, hose pipes, raincoats, etc. X is

Options

A. Bakelite
B. Polyvinyl chloride
C. Nylon
D. Melamine.

Answer

To solve the question, we need to identify the substance X based on the given properties. Let's break it down step by step.

### Step-by-Step Solution:

1. **Identify the Type of Material**:
- The question states that X is a thermoplastic. Thermoplastics are materials that can be easily molded and reshaped upon heating.

**Hint**: Remember that thermoplastics can be re-molded multiple times when heated.

2. **Electrical Insulation**:
- The material does not allow electricity to pass through it, indicating that it is an insulator. This property is crucial for materials used in electrical applications.

**Hint**: Think about materials commonly used for insulation in electrical applications.

3. **Applications of the Material**:
- The question lists several applications: coverings around electrical wires, floor tiles, hose pipes, and raincoats. These applications suggest that the material must be flexible, durable, and resistant to moisture.

**Hint**: Consider materials that are commonly used in everyday items that require flexibility and waterproofing.

4. **Evaluate the Options**:
- The options provided include materials like Bakelite, nylon, and polyvinyl chloride (PVC).
- Bakelite and melamine are thermosetting plastics, which do not fit the criteria since they cannot be reshaped.
- Nylon is a thermoplastic but does not have the necessary stretchability for covering wires effectively.

**Hint**: Eliminate options that do not meet the criteria of being a thermoplastic and suitable for the applications mentioned.

5. **Conclusion**:
- The only material that fits all the criteria is **Polyvinyl Chloride (PVC)**. It is a thermoplastic, an electrical insulator, and is widely used for the applications mentioned in the question.

**Final Answer**: X is **Polyvinyl Chloride (PVC)**.