Dacron is a polymer of :
1. Propylene and para HO—(C6H4)—OH
2. Benzoic acid and ethanol
3. Terephthalic acid and ethylene glycol
4. Benzoic acid and para HO—(C6H4)—OH
Natural rubber has:
1. All trans-configuration
2. Alternate cis - and trans-configuration
3. Random cis - and trans-configuration
4. All cis-configuration
A biodegradable polymer that can be prepared from glycine and aminocaproic acid is:
1. Nylon 2-nylon 6
2. PHBV
3. Buna-N
4. Nylon-6,6
The polymer that is addition as well as copolymer is:
1. PHBV
2. PVC
3. Buna-S
4. Neoprene
Plastic household crockery is prepared by using :
1. Melamine and tetrafluoroethane.
2. Malonic acid and hexamethylene imine.
3. Melamine and vinyl acetate.
4. Melamine and formaldehyde.
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 polymer that is not prepared by condensation process is:
1. Melamine
2. Glyptal
3. Dacron
4. Neoprene