Match the following :
Column I (a} Polythene (b} Melamine (c} Polyester (d} Nylon
Column II (i} Thermosetting Plastic (ii} Thermoplastic (iii} Polyethyleneterephthalate (iv} Ropes for rock climbing

Correct option is B

The correct answer is (b).
Explanation
Polythene is a thermoplastic as it softens on heating. Melamine is a thermosetting plastic which becomes hard and cannot be reshaped once set. Polyester is chemically known as polyethyleneterephthalate. Nylon is strong and flexible, making it suitable for making ropes used in rock climbing.
Additional Information
• Option {a} is incorrect because polythene is not a thermosetting plastic. • Option {c} is incorrect because nylon is not a thermosetting plastic and polyester is not a thermoplastic. • Option {d} is incorrect because the matching of all materials is incorrect.