Question

12. Give reasons
(a) Platinum, gold and silver are
used to make jewellery.
(b) Sodium, potassium and
lithium are stored under oil.
(c) 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

Explanation:

a) they don't react easily and their reactions are very slow in nature

b) they are highly reactive because they are alkali metals.

c) aluminum is used to make utensils because they have high melting point

d) because carbon dioxide released out from carbonate and sulphide ores..

questions I think are from NCERT.

thanks for this question ...

hope u got ur answer ...

have a great day