Question

Match the column I with column II and mark the appropriate choice.

Column I		Column II
(A)	Calcination	(i)	Cr2O3 + 2Al → 2Cr + Al2O3
(B)	Roasting	(ii)	FeCO3 → FeO + CO2
(C)	Smelting	(iii)	2ZnS + 3O2 → ZnO + 2SO2
(D)	Alumino- Thermy	(iv)	PbO + C → Pb + CO

• A. (A)$\rightarrow$ (i), (B)$\rightarrow$ (ii), (C)$\rightarrow$ (iii), (D)$\rightarrow$ (iv)
• B. (A)$\rightarrow$ (iv), (B)$\rightarrow$ (iii), (C)$\rightarrow$ (ii), (D)$\rightarrow$ (i)
• C. (A)$\rightarrow$ (iii), (B)$\rightarrow$ (ii), (C)$\rightarrow$ (i), (D)$\rightarrow$ (iv)
• D. (A)$\rightarrow$ (ii), (B)$\rightarrow$ (iii), (C)$\rightarrow$ (iv), (D)$\rightarrow$ (i)

Answer 1

Answer: (D)

(A)$\rightarrow$ (ii), (B)$\rightarrow$ (iii), (C)$\rightarrow$ (iv), (D)$\rightarrow$ (i)

Answer 2

Calcination is heating the ore in absence of air, roasting in presence of air smelting in presence ore into metal.