Multiple choice

Select the correct match of polymers in Group-I with their frequent uses in Group-II. ||| |---|---| |Group-I | Group-II| |P. Polystyrene |1. making of anticorrosive materials| |Q. Polyvinyl acetate|2. making of moulded materials| |R. Polytetrafluoroethylene|3. making of laptop sleeves and orthopedic braces| |S. Neoprene|4. adhesives|

  1. P - 2, Q - 4, R - 1, S - 3

  2. P - 3, Q - 1, R - 4, S - 2

  3. P - 2, Q - 4, R - 3, S - 1

  4. P - 4, Q - 1, R - 3, S - 2

  5. P - 3, Q - 2, R - 4, S - 1
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A Correct answer
Explanation

Polystyrene (PS) has good thermal insulator properties and is used in the making of moulded materials. Polyvinyl acetate (PVAc) is frequently used in adhesives. Polytetrafluoroethylene (PTFE) has very low coefficient of friction, excellent dielectric properties and chemical inertness. It is used mainly in the making of anticorrosive low friction bearings, non-stick pans, etc. Neoprene or polychloroprene is a family of synthetic rubbers that are produced by polymerisation of chloroprene. Neoprene exhibits good chemical stability and maintains flexibility over a wide temperature range. It is used in a wide variety of applications such as laptop sleeves, orthopedic braces (wrist, knee, etc), electrical insulation, liquid and sheet applied elastomeric membranes or flashings, and automotive fan belts. Hence, the correct answer using the codes is P - 2, Q - 4, R - 1, S - 3.

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