It is easier to obtained a metal from its oxide form as compared to its ………..form.
a) sulphide
b) carbonate
c) both a & b
d) none of these
Methods are used to convert the concentrated ore to its oxide form.
a) roasting
b) smelting
c) bassemerization
d) all of these
The process in which the concentrated ore is heated either alone or with some other materials in excess of air in a furnace is called
a) smelting
b) roasting
c) refining
d) bessemeriation
In roasting concentrated ore is roasted in a furnace b/w 5000C and…………..
a) 6000C
b) 6500C
c) 7000C
d) 7500C
Ores of metals such as …….. when roasted in air, are converted to their oxides and sulphur is oxidized to SO2.
a) copper
b) nickle
c) both a & b
d) lead
