Which of the following is correct about wool?

Conductor

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Insulator

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Radiator

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Wool melts on heating

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Solution

The correct option is B
Insulator

Wool is an insulator. It is used to prevent flow of heat from our body to the surrounding thereby keeping us warm. Wool is naturally more fire-resistant than any other fabric. It does not catch fire easily and does not burn as quickly as other materials. It doesn't melt on heating, unlike nylon.

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Question 25
Indicate whether the following statements are true or false. Also write the false statements in their correct form.

(i) The fabric terry wool is obtained by mixing terylene and wool.
(ii) Synthetic fibres do not melt on heating.
(iii) It is risky to wear synthetic clothes while working in the kitchen.
(iv) Most of the plastics are biodegradable.

Name the following : [3 MARKS]

(a) A lustrous liquid metal.
(b) A liquid non-metal
(c) A metal which can be cut with a knife
(d) A non-metal which is good conductor of electricity.
(e) An element which melts when kept on the palm.
(f) Good conductor of heat.

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