Match List I with List II.
|
LIST I |
LIST II |
|
A. Nylon-6, 6 |
I. Crockery |
|
B. Bakelite |
II. Wire coverings |
|
C. Polyvinyl chloride |
III. Switches |
|
D. Melamine |
IV. Textile industry |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A-IV, B-III, C-II, D-I
The use of a polymer follows from its type: fibres have strong intermolecular forces (hydrogen bonds) and high tensile strength, thermosetting polymers are hard and infusible, and thermoplastics can be moulded and are flexible.
A. Nylon-6, 6 — This matches IV. Textile industry. It is a polyamide fibre made by condensation of hexamethylenediamine and adipic acid; it is used for sheets, bristles for brushes and in the textile industry.
B. Bakelite — This matches III. Switches. It is a cross-linked phenol–formaldehyde polymer, a hard, heat-resistant electrical insulator used for electrical switches, combs and handles of utensils.
C. Polyvinyl chloride — This matches II. Wire coverings. PVC is an addition polymer of vinyl chloride (\( \ce{CH2=CHCl} \)); it is flexible when plasticised, does not conduct electricity and is used to insulate wires, besides pipes, raincoats and flooring.
D. Melamine — This matches I. Crockery. Melamine–formaldehyde polymer is used to make unbreakable crockery.
Shortcut: A-IV and B-III appear together in Options (1) and (2); D-I (melamine crockery) then leaves Option (2).
Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.