Match the Column A with Column B. Column A (Substance) Column B (Application) (a) Oxygen (i) For making crackers (b) Copper (ii) For disinfecting water (c) Sulphur (iii) All living beings inhale during breathing (d) Iron (iv) For making electric wires (e) Chlorine (v) For making rails

(a) Oxygen is the life-sustaining gas that living beings inhale during breathing. This gas is essential for the body to carry out respiration and other life processes. (b) Copper is used for making electric wires because it is ductile and a good conductor of electricity. (c) Sulphur is used for making crackers. These crackers are filled with gunpowder in which sulphur is the main component. (d) Iron is used for making rails as it is strong and cheap. Iron can also be bent into required shapes. (e) Chlorine is used for disinfecting water as it kills disease-causing microorganisms. Column A (Substance) Column B (Application) (a) Oxygen (iii) All living beings inhale during breathing (b) Copper (iv) For making electric wires (c) Sulphur (i) For making crackers (d) Iron (v) For making rails (e) Chlorine (ii) For disinfecting water

Match the Column A with Column B. Column A (Substance) Column B (Application) (a) Carbon (i) For making fertilisers (b) Magnesium (ii) For making purple coloured solution for wounds (c) Iodine (iii) For making chlorophyll (d) Zinc (iv) For galvanising iron (e) Nitrogen (v) As a fuel

(a) Carbon is used as fuel in the form of coal, charcoal, coke, etc. (b) Magnesium is essential to plants for making chlorophyll. (c) Iodine is used for making a purple coloured solution called 'tincture of iodine' which is an antiseptic used for wounds. (d) Zinc is used for galvanising iron. This process involves a layer of molten zinc to be coated on iron to prevent it from rusting when exposed to oxygen and moisture. (e) Nitrogen is used for making fertilisers in the form of ammonia, urea, etc. Column A (Substance) Column B (Application) (a) Carbon (v) As a fuel (b) Magnesium (iii) For making chlorophyll (c) Iodine (ii) For making purple coloured solution for wounds (d) Zinc (iv) For galvanising iron (e) Nitrogen (i) For making fertilisers

E M B I B E

All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Practice>Q 6

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Some metals react with sodium hydroxide to produce hydrogen gas.

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Important Questions on Materials: Metals and Non-metals

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All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Practice>Q 7

Phosphorous is used in water purification process.

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All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Practice>Q 8

Iron is used in constructing bridges and houses.

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8th CBSE

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All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Practice>Q 1

Match the Column A with Column B.

Column A (Substance)	Column B (Application)
(a) Oxygen	(i) For making crackers
(b) Copper	(ii) For disinfecting water
(c) Sulphur	(iii) All living beings inhale during breathing
(d) Iron	(iv) For making electric wires
(e) Chlorine	(v) For making rails

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8th CBSE

IMPORTANT

All in One - SCIENCE CBSE Class 8>Chapter 4 - Materials: Metals and Non-metals>Chapter Practice>Q 2

Match the Column A with Column B.

Column A (Substance)	Column B (Application)
(a) Carbon	(i) For making fertilisers
(b) Magnesium	(ii) For making purple coloured solution for wounds
(c) Iodine	(iii) For making chlorophyll
(d) Zinc	(iv) For galvanising iron
(e) Nitrogen	(v) As a fuel