Match the metal in List I with the usual method of obtaining it in List II. List I: (A) Iron; (B) Aluminium; (C) Mercury; (D) Copper from Cu2S. List II: (p) Electrolysis of Al2O3 in molten cryolite; (q) Roasting of cinnabar, no reductant; (r) Reduction with CO/coke in a blast furnace; (s) Self-reduction of Cu2S with Cu2O.

JEE Main levelSingle correct optionDifficulty 2 of 3mt204

Match the metal in List I with the usual method of obtaining it in List II. List I: (A) Iron; (B) Aluminium; (C) Mercury; (D) Copper from $Cu X_{2} S$ . List II: (p) Electrolysis of $Al X_{2} O X_{3}$ in molten cryolite; (q) Roasting of cinnabar, no reductant; (r) Reduction with CO/coke in a blast furnace; (s) Self-reduction of $Cu X_{2} S$ with $Cu X_{2} O$ .

Iron oxide is reduced by CO in a blast furnace. Aluminium needs electrolysis because

Al X_{2} O X_{3}

is too stable for carbon.

HgS

gives Hg on roasting itself. Copper sulfide is partly oxidised and

2 Cu X_{2} O + Cu X_{2} S 6 Cu + SO X_{2}