The metals zinc and tin are present only in:
Food cans are coated with tin and not with zinc because
(a) zinc is costlier than tin.
(b) zinc has a higher melting point than tin.
(c) zinc is more reactive than tin.
(d) zinc is less reactive than tin.
Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin and Copper etc. are reduced by using
Brass is an alloy of :
(a) Copper and tin, (b) Copper and zinc,
(c) Zinc and lead, (d) Lead and tin.