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Give reasons: a. Platinum, gold, and s...

Give reasons:
a. Platinum, gold, and silver are used to make jewellery.
b. Sodium, potassium, and lithium ar stored under oil.
c. Aluminilum is a higly reactive metal, yet it is used to make utensils for cooking.
d. Carbonate and sulphate ores are usually converted into oxides during metal extraction.

Text Solution

Verified by Experts

a. Because they are less reactive
b. As they are very reactive
c. Due to the formation of a stable aluminium oxide layer
d. As oxides can be reduced to crude metal readily.
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