Q. No.True statements regarding polymers are:
a. Polymers have a low molecular weight.
b. Polymers have high viscosity.
c. Polymers scatter light.
d. Polymers do not carry any charge.
1. a, b and c
2. a, b and d
3. b, c and d
4. a, c and d
Low-density polythene is prepared by -
1. Free-radical polymerization.
2. Cationic polymerization.
3. Anionic polymerization.
4. Ziegler-Natta polymerization.
Peroxide initiated polymerizations occur via -
1. Hydrocarbon combustion
2. Natural process synthesis
3. Isomeric saponification
4. Free radical chain propagation
Select the correct option based on statements below:
| Assertion (A): | Olefinic monomers undergo addition polymerization. |
| Reason (R): | Polymerisation of vinyl chloride is initiated by peroxides/persulphates. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
In the reaction–
Reagent X is–
1. Triethylaluminium and titanium tetrachloride.
2. Triethyl aluminum.
3. Zeigler Natta Catalyst.
4. Both 1 & 3
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. |
Polymer that is used to make non stick cookware is:
1. PVC
2. Polysterene
3. Polyethylene
4. PTFE
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