Q13 of 34 Page 70

Give reason why copper cannot displace zinc from its salt solution.

Copper cannot displace zinc from its salt solution because copper is less reactive than zinc. More reactive metal displaces less reactive metal from its salt solution.


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11

Phosphorus is kept in water. Why?

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What is the nature of oxides formed

(a) when metals combine with oxygen?


(b) when non-metals combine with oxygen?

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(a) Define

(i) Malleability (ii) Ductility


(b) Name a non-metal which is very hard.

 15

Give reasons, why

(a) immersion rods for heating liquids are made up of metallic substances?


(b) Non metals cannot be used for making bells?