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How can polythene carry bags be harmful for animals?
Polythene carry bags are thrown here and there after using them. Stray cattle consume them. Since it is not digested by animal and it can choke the respiratory system and damage their stomach. It can even cause their death.
Explain why plastic containers are favoured for storing food.
Explain the difference between the thermoplastic and thermosetting plastics.
Explain why the following are made of thermosetting plastics.
(a) Saucepan handles
(b) Electric plugs/switches/plug boards
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.
Rana wants to buy shirts for summer. Should he buy cotton shirts or
shirts made from synthetic material? Advise Rana, giving your reason.
Give examples to show that plastics are noncorrosive in nature.
Should the handle and bristles of a tooth brush be made of the same material? Explain your answer.
‘Avoid plastics as far as possible’. Comment on this advice.
Match the following of column I correctly with the phrases given in column II:
‘Manufacturing synthetic fibres is actually helping conservation of forests’.
Comment.
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