1(iii)
The reason for using Aluminium in the alloy duralumin is:
- (a)Aluminium is brittle.
- (b)Aluminium gives strength.
- (c)Aluminium brings lightness.
- (d)Aluminium lowers melting point.
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Aluminium brings lightness.
Reason — As aluminum gives strength and brings lightness, hence, it is used in the alloy duralumin.