Column (I) (Chemical change during metallurgy) Here in different options M can be different Column (II) (Purpose in metallurgy of specified metal) (A) M 2 O 3 + C + Electrical energy → M + CO / CO

Question

Column (I) (Chemical change during metallurgy) Here in different options M can be different	Column (II) (Purpose in metallurgy of specified metal)
(A) $M_{2} O_{3} + C +$ Electrical energy $\to M + CO / CO_{2}$	(P) Purification of copper
(B) $(M + Co + Fe) + CO Δ 50 C Fe (s) + Co (s) + [vapours of carbonyl complex of M]$	(Q) Benification of bauxite
(C) $(Fe_{2} O_{3}, M_{2} O_{3}) (s) + OH - (aq) \to Fe_{2} O_{3} (s) + [M (OH)_{4}]^{-}$ sol.	(R) Extraction of metal from alumina
(D) $(Fe, M, Ag, Au) + Electrolytic oxidation in aq. solution of metal (M) salt Fe_{aq}^{+ 2} + M_{aq}^{+ 2} + Ag_{(s)} + Au_{(s)}$	(S) Separation of Nickel from impurities

TestHub · Accepted Answer

(A) M 2 ​ O 3 ​ + C + El ec t r i c a l e n er g y → M + CO / C O 2 ​ represents the Hall-Heroult process for aluminum extraction (R). (B) ( M + C o + F e ) + CO Δ , 5 0 ∘ C ​ F e ( s ) + C o ( s ) + [ v a p o u rso f c a r b o n y l co m pl e x o f M ] is the Mond process for nickel purification (S). (C) ( F e 2 ​ O 3 ​ , M 2 ​ O 3 ​ ) ( s ) + O H − ( a q ) → F e 2 ​ O 3 ​ ( s ) + [ M ( O H ) 4 ​ ] − is the Bayer process for bauxite beneficiation (Q). (D) ( F e , M , A g , A u ) + El ec t ro l y t i co x i d a t i o n → F e a q + 2 ​ + M a q + 2 ​ + A g ( s ) ​ + A u ( s ) ​ describes electrolytic refining of copper (P).

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