Question

Copolymers are polymerized from two or more different monomers. The subcategories of copolymers are:
(A) Random Copolymer
(B) Block Copolymer
(C) Alternating Copolymer
(D) Graft Copolymer
Choose the correct answer from the options given below:

• A. A, B and D only
• B. A, B and C only
• C. A, B, C and D only
• D. B, C and D only

Hint:

Random, Block, Alternating, and Graft — always remember the four types of copolymers.

Answer 1

The Correct Option is C

Step 1: Definition of copolymers.
When two or more different types of monomers combine to form a polymer chain, the resulting polymer is called a copolymer.
Copolymers are very important in industry because they allow scientists to tailor properties like strength, elasticity, and heat resistance.
Step 2: Explanation of the four types.
- Random Copolymer: Monomers are arranged in a random order. Example: Styrene-butadiene rubber.
- Block Copolymer: Large blocks of one monomer are followed by blocks of another. Example: Styrene-butadiene-styrene (SBS).
- Alternating Copolymer: Monomers alternate strictly one after the other. Example: Styrene-maleic anhydride copolymer.
- Graft Copolymer: A main chain of one type with side branches of another type. Example: High-impact polystyrene (HIPS).
Step 3: Option analysis.
- Option 1 (A, B, D only): Incorrect, because alternating copolymer is also a valid subcategory.
- Option 2 (A, B, C only): Incorrect, because graft copolymer is missing.
- Option 3 (A, B, C and D only): Correct, as all four are valid.
- Option 4 (B, C and D only): Incorrect, because random copolymer is valid too.
Step 4: Conclusion.
Therefore, all four types are valid subcategories of copolymers.