MEDIUM
Earn 100

What is melamine?

Important Questions on Polymer Chemistry

MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
Which polymer is used in the preparation of non-sticking cooking vessels?
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
Which resin is prepared from urea and formaldehyde?
EASY
Science>Chemistry>Polymer Chemistry>Plastics
What are plastics? Name any five commonly used articles made of plastics.
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
Explain why the following are made of thermosetting plastics.
(a) Saucepan handles
(b) Electric plugs/ switches/ plug boards
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
Write the full form of PVC. Is it thermoplastic or thermosetting plastic?
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
What are the various types of plastics? Give two examples of each type of plastics.
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
Give two uses of PVC.
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
Explain why, frying pan handles are made of thermosetting plastics.
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics

Polythene bags are non-biodegradable. They collect in our surroundings and pollute the soil and water. Old cotton fabric and even old denim cloth can be used to make bags to carry vegetables, fruits, milk sachets and other household items. This would reduce the use of polythene bags.

Should vegetable vendors and shopkeepers sell goods in polythene bags?

MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
Write two uses of bakelite.
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Science>Chemistry>Polymer Chemistry>Plastics
Name four different plastics.
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
What are thermoplastics? Give two examples of thermoplastics.
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
Why are thermoplastics not used for making frying pan handles?
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
State two uses of melamine.
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
Choose the thermoplastics and thermosetting plastics from the following:
Melamine, Polythene, Bakelite, Polyvinyl chloride
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Science>Chemistry>Polymer Chemistry>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.
HARD
Science>Chemistry>Polymer Chemistry>Plastics
Explain why thermoplastics become soft on heating but thermosetting plastics do not become soft on heating. Draw labelled diagrams to illustrate your answer.
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics
State two uses of polythene.
MEDIUM
Science>Chemistry>Polymer Chemistry>Plastics

Polythene bags are non-biodegradable. They collect in our surroundings and pollute the soil and water. Old cotton fabric and even old denim cloth can be used to make bags to carry vegetables, fruits, milk sachets and other household items. This would reduce the use of polythene bags.

Do you think polythene bags make your surroundings unclean?

EASY
Science>Chemistry>Polymer Chemistry>Plastics
Explain the difference between thermoplastic and thermosetting plastics.