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Question

Which one of the following is a thermosetting plastic?

A
Polystyrene
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B
Melamine
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C
Bakelite
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D
Polyvinyl Chloride
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Solution

The correct options are
B Melamine
C Bakelite
Thermosetting plastics are those which once moulded, cannot be softened by heating. Examples inculde:

1) Bakelite: Used for making electrical switches, handles of various utensils

2) Melamine: Used for making floor tiles, kitchenware and fabrics which can resist heat

Polyvinyl chloride and polystyrene are examples of thermoplastics that deform on heating.

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