Question

- 12. Give reasons
(a) Platinum, gold and silver are
used to make jewellery.
(b) Sodium, potassium and
lithium are stored under oil.
Aluminium is a highly reactive
metal, yet it is used to make
utensils for cooking.
(d) Carbonate and sulphide ores
are usually converted into
oxides during the process of
extraction.​

Answer 1

Answer:

(a)Because they all have property of malleablity,ductility and lustrous by which they can be beaten and molded according to us.

(b)Because they are highly reactive metals which will react vigorously with air and water. so they2are kept in oil

(c)Because aluminium is light in weight and when it react with air it forms layer of oxides around it which prevents aluminium and utensil from getting corroded

(d)Because it is easier to obtain metals from it's oxides as compared to carbonate and sulphide ores

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