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Indicate whet...

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Indicate whether the following statements are True or False. Also, write the false statement in their correct form.
(i) The fabric terywool 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.

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Solution

(i) The fabric terywool is obtained by mixing terylene and wool.
Hence, the given statement is true.
(ii) The given statement is false.
Synthetic fibres melt on heating.
(iii) It is risky to wear synthetic clothes while working in the kitchen
Hence, the given statement is true.
(iv) The given statement is false.
Plastics are non-biodegradable in nature.

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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.

State True or False :

It is risky to wear synthetic clothes while working in the kitchen.

Q. Are these statements true or false? Rewrite the false ones correctly.
(a) Polymers are small molecules made by stringing together several monomers.
(b) Blended fabrics contain only synthetic fibres.
(c) Dusters made of nylon or other synthetic materials are good for use in the kitchen.
(d) Polyester fibres are obtained from petroleum products.
(e) Terylene, a synthetic fibre, can be used instead of wool.
(f) Rayon, which is obtained from cellulose, is a natural fibre.

We should wear synthetic clothes while working in kitchen or laboratory. True/False.

Q. Why is it not advisable to wear synthetic clothes while bursting fire crackers?

(i) All synthetic fibres are prepared by using raw materials of petroleum origin.

(ii) Synthetic fibres catch fire easily.

(iii) On heating, synthetic fibres melt and stick to the body of the person wearing it.

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