Question

Consider the following statements: Statement-I: Polystyrene is a thermosetting polymer. Statement-II: Bakelite is a thermoplastic polymer.

• A. Both Statement-I and statement-II are correct
• B. Statement-I is correct but statement-II is not correct
• C. Statement-I is not correct but statement-II is correct
• D. Both Statement-I and statement-II are not correct

Hint:

Remember: Thermoplastics melt; Thermosets set permanently.

Answer 1

The Correct Option is D

Step 1: Recall the two types of polymers.
Thermoplastic polymers soften when heated and can be remoulded. Thermosetting polymers set hard on heating and cannot be remoulded.

Step 2: Classify polystyrene.
Polystyrene can be softened by heating and hardened again by cooling, again and again. So polystyrene is a thermoplastic, not a thermosetting polymer.

Step 3: Check statement I.
Statement I says polystyrene is thermosetting. Since it is really thermoplastic, statement I is false.

Step 4: Classify bakelite.
Bakelite is a heavily cross-linked polymer that sets permanently on heating. So bakelite is a thermosetting polymer, not thermoplastic.

Step 5: Check statement II.
Statement II says bakelite is thermoplastic. Since it is really thermosetting, statement II is false.

Step 6: Combine the results.
Both statements are wrong. \[ \boxed{\text{Both statements are not correct}} \]