A reddish brown coloured metal 'P'and silvery white coloured metal Q both are highly ductile andare good conductors of heat and electricity. P plays a major role in the preparation of brass and bronze whereas Q is the most abundant element in theearth's crust, after oxygenandsilicon, but Q is used as a substitute for P. Give reasons.

A reddish brown coloured metal 'P'and silvery white coloured metal Q b

1.	A reddish brown coloured metal 'P'and silvery white coloured metal Q both are highly ductile andare good conductors of heat and electricity. P plays a major role in the preparation of brass and bronze whereas Q is the most abundant element in theearth's crust, after oxygenandsilicon, but Q is used as a substitute for P. Give reasons.
Answer» Solution :Brass and bronze mainly contain contain copper which is a reddish brown COLOURED metal. The most abundant element in the earth's crust after oxygen and silicon is ALUMINUM whichis SILVERY white coloured metal. So 'P' is copper and 'Q' is alminium. Both copper and aluminium are GOOD conductors of heat and electricity. Since copperis costly metal, aluminium is USED as a substitute for copper.