The polymer that is used as a substitute for wool in making commercial fibres is -
1. Melamine
2. Nylon-6, 6
3. Polyacrylonitrile
4. Buna-N
The incorrect match among the following options is:
1. | Terylene— condensation polymer of terephthalic acid and ethylene glycol. |
2. | Teflon— thermally stable cross-linked polymer of phenol and formaldehyde. |
3. | Perspex— a homopolymer of methyl methacrylate. |
4. | Synthetic rubber — a copolymer of butadiene and styrene. |
Rubber is heated with sulphur and the process is known as:
1. Galvanization.
2. Vulcanization.
3. Bessemerization.
4. Sulphonation.
Melamine plastic crockery is a copolymer of:
1. HCHO and melamine.
2. HCHO and ethylene.
3. Melamine and ethylene.
4. None of the above.
Polyamide is represented by:
1. Teflon
2. Nylon – 6,6
3. Terylene
4. Bakelite
The initial reaction in the formation of bakelite is an example of:
1. Aromatic electrophilic substitution
2. Aromatic nucleophilic substitution
3. Free radical reaction
4. Aldol reaction
The polymer that is not prepared by condensation process is:
1. Melamine
2. Glyptal
3. Dacron
4. Neoprene
Buna-S is a synthetic copolymer of:
1. Styrene and buta-1,3-diene.
2. Styrene and ethylene.
3. 1,3-Butadiene and ethylene.
4. None of the above.
Natural rubber is a polymer of :-
1. Isoprene
2. Styrene
3. Ethylene
4. Butadiene
Polymer that is used to make non stick cookware is:
1. PVC
2. Polysterene
3. Polyethylene
4. PTFE