The main constituents of plastics are
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There occurs an increase in softness, flexibility and ease in processing of plastics with the addition of
Select the true statements among the following:
Thermosetting plastics are
1. Formed by addition polymerisation
2. Formed by condensation polymerisation
3. Softened on heating and hardened on cooling for any number of times
4. Moulded by heating and cooling
The chemical name of Bakelite is
Which of the following polymers produces HCI as condensate?
The natural fibres are made from simple molecule that is known as
The fibres which resemble wool are known as
Consider the following types of waste:
1. Cotton cloth
2. Woollen clothes
3. Metal parts
4. Plastic bags
Q. Which of the above are non-biodegradable?
45 videos|314 tests
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45 videos|314 tests
|