Question

Polystyrene belongs to:

• A. Ceramic material
• B. Composite material
• C. Thermoplastic material
• D. Structural material

Hint:

Polystyrene is a \textbf{thermoplastic polymer} — it softens on heating and is used widely in packaging and consumer products.

Answer 1

The Correct Option is C

Step 1: Understanding Polystyrene
Polystyrene is a synthetic aromatic polymer made from the monomer styrene. It is: - Lightweight, - Rigid, - Easily molded. Step 2: Classification
Polystyrene is classified as a thermoplastic, which means: - It softens upon heating, - Can be reshaped multiple times, - Solidifies upon cooling without chemical change. Step 3: Applications
Used in: - Packaging (e.g., foam cups, containers), - Disposable cutlery, - CD and DVD cases, - Insulation materials. Step 4: Elimination of Incorrect Options
- Ceramic material: Inorganic and brittle — polystyrene is organic and ductile when heated.
- Composite material: Not a combination of distinct phases or reinforcements.
- Structural material: Although used in construction, it lacks mechanical robustness to be termed “structural” material. Conclusion: Polystyrene is a thermoplastic material that can be repeatedly heated and molded.