Textbook questions IX — task. Science CBSE, Class 10.

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Give reasons:

a. Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.

It is corrosion resistant and a good heat conductor
It gives lustre appearance and conducts limited heat
It gives lustre appearance and corrosion resistant
None of these

b. Carbonate and sulphide ores are usually converted into oxides during the process of extraction.

Obtaining a metal from its oxide is easier when compared to its sulphides and carbonates.
Sulphides and carbonates are highly stable.
We cannot obtain metals from their sulphides and carbonates.
Sulphides and carbonates are unstable.

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