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Chapter 3 Synthetic Fibres and Plastics Solutions

Question - 11 : -  ‘Avoid plastics as far as possible’. Comment on this advice.

Answer - 11 : -

We should avoid plastics as far as possible because plastics are non-biodegradable in nature. Once introduced into the environment they cause pollution. If burnt they release poisonous gases and the the plastic bags thrown in the garbage dumb are swallowed by animals choke their respiratory system and causes fatalities in animals.

Question - 12 : - ‘Manufacturing synthetic fibres is actually helping conservation of forests’. Comment.

Answer - 12 : -

The manufacturing of synthetic fibers is helpful in the conservation of forests because if we use natural fibers, the raw materials for them have to be derived from the plants, which require cutting off lots of trees. This proves to be helpful in the conservation of forests.

Question - 13 : -
Describe an activity to show that thermoplastic is a poor conductor of electricity

Answer - 13 : -

In order to show that thermoplastic is a poor conductor of electricity, we will design a circuit. For that, we need a bulb, some wires, a battery, a piece of metal and a plastic pipe (as shown in the figure below). After setting the experiment switch on the current, you will observe that the bulb glows in the former case. In the latter case, the bulb does not glow. Hence a plastic pipe (which is a thermoplastic) is shown to be a poor conductor of electricity.

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