Assertion - Thermosetting plastics cannot be remoulded on heating.

Reason - Formation of strong cross-links during initial moulding gives thermosetting plastics a strong structure.

Assertion is correct but the reason is wrong

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Assertion is wrong but the reason is correct

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Both assertion and reason are correct

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Both assertion and reason are wrong

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Solution

The correct option is C Both assertion and reason are correct
Thermosetting plastics are those plastics which once moulded cannot be remoulded by heating. They are strong, durable and resists heat to a large extent. The well known examples are bakelite and melamine.

During initial moulding, thermosetting plastics form strong cross-links between them which gives them their strong structure.

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Assertion - Thermosetting plastics cannot be remoulded on heating. Reason - Formation of strong cross-links during initial moulding gives thermosetting plastics a strong structure.

Assertion - Thermosetting plastics cannot be remoulded on heating.

Reason - Formation of strong cross-links during initial moulding gives thermosetting plastics a strong structure.