Q. No.Which of the following is wrong?
1. PMMA is called plexiglass
2. PTFE is called teflon
3. SBR is called natural rubber
4. LDPE is called low density polyethylene
1. PMMA is called plexiglass
2. PTFE is called teflon
3. SBR is called natural rubber
4. LDPE is called low density polyethylene
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Which of the following is not a fibre?
1. Terylene
2. Nylons
3. Polyacrylonitrile
4. Polychloroprene
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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. |
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Which is/are true for elastomers?
1. These are synthetic polymers possessing elasticity
2. These possess very weak intermolecular forces of attractions between polymer chains
3. Vulcanised rubber is an example of elastomer
4. All of the above
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Rubber is heated with sulphur and the process is known as:
1. Galvanization.
2. Vulcanization.
3. Bessemerization.
4. Sulphonation.
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Which of the following is used to make non stick cookware ?
1. PVC
2. Polysterene
3. Polyethylene
4. PTFE
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Buna-S is a synthetic copolymer of:
1. Styrene and 1,3-butadiene
2. Styrene and ethylene
3. 1,3-Butadiene and ethylene
4. None of the above
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Gutta parcha rubber is:
1. A trans-1,4-polyisoprene polymer
2. A very hard material
3. A synthetic polymer
4. All of the above
Perspex or plexiglass is a polymer of-
1. Methyl methylacrylate
2. Methylacrylate
3. Acrylonitrile
4. None of the above
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