Question

Which polymer is used in the manufacture of paints and lacquers?
(A) Bakelite
(B) Glyptal
(C) Polypropene
(D) Polyvinyl chloride

Answer 1

Hint Each polymer has a different function. Some paints contain volatile organic compounds such as easters. Hence, the correct option will be an option which possesses an ester group.

Complete step by step answer:
- Polymers are very large molecules made from the combination of many smaller molecules, connected end to end. The smaller molecules are called monomers.
- Polymer used in the manufacture of paints and lacquers is Glyptal. It is also used as a binding material and in preparation of mixed plastics.
- It is an alkyd resin. It is a copolymer of ethylene glycol and phthalic acid. It is obtained by condensation polymerisation and is a polyester.
- In the formation of Glyptal, hydrogen atoms of hydroxyl group of ethylene glycol combine with hydroxyl group of carboxylic function group of phthalic acid and a molecule of water is eliminated.
- Bakelite is used in making combs, phonograph records, handles of various utensils and electrical switches. It is a copolymer of formaldehyde and is prepared by condensation polymerisation.
- Polypropene is used in manufacture of pipes, carpet fibres, ropes and toys. It is also used in storage battery tanks. It is a homopolymer of propylene.
- Polyvinyl chloride is used in the manufacture of raincoats, water pipes, electrical insulation and hand bags. It is a homopolymer of vinyl chloride.

Therefore, the answer to the question is (B) Glyptal.

Note: Do not mix the functions of different polymers. Each polymer has a specific function. Out of the four options, only one polymer is used in the manufacture of paints and lacquers, remaining three polymers have different functions.