Chapter 15: Polymers
NCERT Solutions for CBSE Class 10 Chemistry — 18 solved questions with detailed explanations.
Solved Questions
Q1. Nylon-6,6 is an example of:
- Addition polymer
- Condensation polymer
- Natural polymer
- Copolymer of addition type
Difficulty: Easy · Topic: Classification
Solution
Nylon-6,6 is a condensation polymer of hexamethylenediamine and adipic acid with loss of water.
Q2. The monomer of Teflon is:
- Ethylene
- Vinyl chloride
- Tetrafluoroethylene
- Propylene
Difficulty: Easy · Topic: Monomers
Solution
Teflon = Polytetrafluoroethylene (PTFE). Monomer: CF₂=CF₂ (tetrafluoroethylene).
Q3. Bakelite is a polymer of:
- Ethylene glycol + terephthalic acid
- Phenol + formaldehyde
- Caprolactam
- Styrene + butadiene
Difficulty: Easy · Topic: Bakelite
Solution
Bakelite = phenol-formaldehyde resin. Thermosetting polymer with cross-linked structure.
Q4. Monomer(s) of Polyethylene:
- Vinyl chloride
- Propylene
- Ethylene
- Styrene
Difficulty: Easy · Topic: Monomers
Solution
Polyethylene is made from Ethylene.
Q5. Monomer(s) of PVC:
- Vinyl chloride
- Styrene
- Ethylene
- Propylene
Difficulty: Easy · Topic: Monomers
Solution
PVC is made from Vinyl chloride.
Q6. Monomer(s) of Polypropylene:
- Butadiene
- Ethylene
- Propylene
- Styrene
Difficulty: Easy · Topic: Monomers
Solution
Polypropylene is made from Propylene.
Q7. Monomer(s) of Polystyrene:
- Styrene
- Vinyl chloride
- Ethylene
- Propylene
Difficulty: Easy · Topic: Monomers
Solution
Polystyrene is made from Styrene.
Q8. Monomer(s) of PTFE (Teflon):
- Tetrafluoroethylene
- Propylene
- Ethylene
- Vinyl chloride
Difficulty: Easy · Topic: Monomers
Solution
PTFE (Teflon) is made from Tetrafluoroethylene.
Q9. Monomer(s) of Neoprene:
- Styrene
- Chloroprene
- Isoprene
- Butadiene
Difficulty: Easy · Topic: Monomers
Solution
Neoprene is made from Chloroprene.
Q10. Monomer(s) of Natural rubber:
- Butadiene
- Ethylene
- Chloroprene
- Isoprene
Difficulty: Easy · Topic: Monomers
Solution
Natural rubber is made from Isoprene.
Q11. Monomer(s) of Nylon 6:
- Terephthalic acid
- Hexamethylenediamine
- Caprolactam
- Adipic acid
Difficulty: Easy · Topic: Monomers
Solution
Nylon 6 is made from Caprolactam.
Q12. Monomer(s) of Dacron/PET:
- Adipic acid + HMD
- Phenol + Formaldehyde
- Ethylene glycol + Terephthalic acid
- Caprolactam
Difficulty: Easy · Topic: Monomers
Solution
Dacron/PET is made from Ethylene glycol + Terephthalic acid.
Q13. Monomer(s) of Bakelite:
- Styrene
- Urea + Formaldehyde
- Phenol + Formaldehyde
- Ethylene
Difficulty: Easy · Topic: Monomers
Solution
Bakelite is made from Phenol + Formaldehyde.
Q14. PVC monomer is:
- ethylene
- styrene
- vinyl chloride
- propylene
Difficulty: Easy-Medium · Topic: Polymers
Q15. Natural rubber is polymer of:
- styrene
- butadiene
- isoprene
- chloroprene
Difficulty: Easy-Medium · Topic: Polymers
Q16. Vulcanization involves adding:
- carbon to rubber
- oxygen to rubber
- nitrogen to rubber
- sulfur to rubber
Difficulty: Easy-Medium · Topic: Polymers
Solution
sulfur to rubber.
Q17. Thermoplastic polymers can be:
- dissolved in water
- remoulded on heating
- only moulded once
- not remoulded
Difficulty: Easy-Medium · Topic: Polymers
Solution
remoulded on heating.
Q18. Thermosetting polymers:
- cannot be remoulded
- can be remoulded
- are always flexible
- dissolve in water
Difficulty: Easy-Medium · Topic: Polymers
Solution
cannot be remoulded.
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