. Why it is not advisable to burn plastics and synthetic fibres

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Name two metals which are liquid at room temperature

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Avoid plastics as far as possible Comment on this advice

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The unit of calorific value is

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The phenomenon of marble cancer is due to

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Artificial man - made wool is known by the name

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Which fibre is obtained from flax seeds

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Coal natural gas and petroleum are

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The material is similar to silk in appearance is

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Linen fibre is obtained from

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Polycot is obtained by mixing

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Sulfur is an insulator unlike metals which contain a

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Soda acid fire extinguishers contains sulphuric acid and

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State True or False Coke is almost pure form of carbon

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Which of the following represents natural fibres

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