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Question 4
Which is a thermosetting plastic?

(a) Melamine
(b) Polythene
(c) PVC
(d) Nylon

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Solution

(a) Melamine

A thermosetting plastic, also called a thermoset, is a plastic that is irreversibly cured from a soft solid or viscous liquid prepolymer or resin. Thermoset resins are usually malleable or liquid prior to curing and are often designed to be moulded into their final shape, or used as adhesives.

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Q. Question 4
Which is a thermosetting plastic?

(a) Melamine
(b) Polythene
(c) PVC
(d) Nylon

Q. Study the given flowchart carefully.

K, L, P a n d Q

K L P Q

Choose your answer from A, B, C and D and enter accordingly.

Q. polythene, polystyrene, nylon, PVC, rayon, terene, acrylic, formica, polycot, melamine
The list of materials mentioned above can be classified as
(a) synthetic fibres and plastics.
(b) polyester fibres and objects made of glass.
(c) man-made materials and plastics.
(d) synthetic fibres and thermoplastics.

Choose the thermoplastics and thermosetting plastics from the following :

Melamine, Polythene, Bakelite, Polyvinyl chloride

Q. Classify the following into thermosetting platics and thermoplastic:

(a) Melamine (b) PVC

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