What is an alloy ? Name the alloys and their constituents used for : (i) making aeroplanes (ii) soldering.

Explanation

Alloy is a homogeneous mixture of two metals or a metal with a non-metal.
(i) The alloy used for making aeroplanes is duralumin :
Duralumin : Al = 95%, Cu = 4%, Mg = 0.5%, Mn = 0.5%
(ii) The alloy used for soldering is solder :
Solder : Pb = 50%, Sn = 50%.