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Thermosetting Plastics

Thermosetting...

Question

Thermosetting plastics are very light, strong, durable and can be remoulded after being heated above a specific temperature.

A

True

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B

False

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Solution

The correct option is B
False

There are some plastics which when once moulded cannot be softened by heating. These are called thermosetting plastics. For example, bakelite and melamine. On the other hand, thermoplastics can be repeatedly moulded if they are heated above a specific temperature, e.g. PVC, nylon.

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Similar questions

Q. Assertion - Thermosetting plastics cannot be remoulded on heating.

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

Q. Statement I: Elastomers are not very strong and stretchable.
Statement II: Thermosetting plastics can be deformed and moulded into different shapes on heating.

Q. The plastics that can be remoulded on heating are called _______ and those which cannot be remoulded are called _______.

Q. Plastics that can be melted on heating and remoulded easily are known as .

Q. Statement: The articles made of thermoplastics can be recycled whereas the articles made of thermosetting plastics cannot be recycled.

State whether the given statement is true or false.

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