1.

Give reason : (i) "Alloys of iron are more useful when compared to pure iron" (ii) Alumunium oxide is called amphoteric oxide

Answer»

Solution :(i) Pure IRON is very soft
Stretches, when easily wher HOT
Alloys are HARD
The properties of iron can be changed if it is MIXED with other substances.
(ii) Aluminium oxide `(Al_(2)O_(3))` reacts with both acids as well as bases to produce salt and water.


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