Question

DMatch the column tand column 2 and mark the appropriate choice
Column 1
Column 2
A.calcination
a)Cr2O3 + 2A + 2Cr +Al,O
B.Roasting
b]FeCO + FeO+CO
C.smelting
c)2ZnS1302->ZnO+250,
D Aluminothermy
d)PbO+C - Pb+CO​

Answer 1

(A) carbonate ores goes under calcination so FeCO3-FeO+CO2

(B) sulphide ores undergoes roasting so 2ZnS+3O2-2ZnO+2SO2

(C) smelting refers to extraction of metal from ore by heating here leadoxide is converted into lead so PbO+C-Pb+CO

(D) aluminothermy contains aluminium so obviously Cr2O3+2Al-2Cr+Al2O3