Explain why thermoplastics become soft on heating but thermosetting plastics do not become soft on heating. Draw labelled diagrams to illustrate your answer.

Important Questions on Synthetic Fibres and Plastics

MEDIUM

Science>Chemistry>Synthetic Fibres and Plastics>Plastics

Which polymer is used in the preparation of non-sticking cooking vessels?

MEDIUM

Science>Chemistry>Synthetic Fibres and Plastics>Plastics

Which resin is prepared from urea and formaldehyde?

MEDIUM

Science>Chemistry>Synthetic Fibres and Plastics>Plastics

What are thermosetting plastics? Give two examples of thermosetting plastics.

MEDIUM

Science>Chemistry>Synthetic Fibres and Plastics>Plastics

Which is better material for constructing handle of a pressure cooker -a thermoplastic or a thermosetting plastic?

EASY

Science>Chemistry>Synthetic Fibres and Plastics>Plastics

Explain the difference between thermoplastic and thermosetting plastics.

MEDIUM

Science>Chemistry>Synthetic Fibres and Plastics>Plastics

State two uses of melamine.

MEDIUM

Science>Chemistry>Synthetic Fibres and Plastics>Plastics

Categorise the materials of the following products into 'can be recycled' and 'cannot be recycled'.
Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic bowls, plastic covering on electrical wires, plastic chairs, electrical switches.

MEDIUM

Science>Chemistry>Synthetic Fibres and Plastics>Plastics

Explain why, frying pan handles are made of thermosetting plastics.

MEDIUM

Science>Chemistry>Synthetic Fibres and Plastics>Plastics

What type of plastic is used to make electric switches?

EASY

Science>Chemistry>Synthetic Fibres and Plastics>Plastics

All the plastic materials that can be softened and melted by heating, but they set again when cool is called _____ .

EASY

Science>Chemistry>Synthetic Fibres and Plastics>Plastics

Which of the following is a use of Melamine?