Which of the following is not an illustration of a smelting method?
$2 N a C l (f u s e d) + e l e c t r i c e n e r g y \to 2 N a + {C l}_{2}$
${A l}_{2} O_{3} + 3 C \to 2 A l + 3 C O$
$2 Z n S + 3 O_{2} \to 2 Z n O + 2 {S O}_{2}$
$C u O + H_{2} \to C u + H_{2} O$

Question

Which of the following is not an illustration of a smelting method?
$2 N a C l (f u s e d) + e l e c t r i c e n e r g y \to 2 N a + {C l}_{2}$
${A l}_{2} O_{3} + 3 C \to 2 A l + 3 C O$
$2 Z n S + 3 O_{2} \to 2 Z n O + 2 {S O}_{2}$
$C u O + H_{2} \to C u + H_{2} O$

Toppr Admin · Accepted Answer

It is the process by which a metal is obtained- either as the element or as a simple compound- from its ore by heating beyond the melting point- ordinarily in the presence of oxidizing agents- such as air- or reducing agents- such as coke- An oxidising agent is used in case of Al-Zn and Cu and so sodium reaction is not a smelting method-

List I	List II
A. Calcination	a. $2 {C u}_{2} S + 3 O_{2} \to 2 {C u}_{2} O + 2 S O_{2}$
B. Roasting	b. ${F e}_{2} O_{3} \cdot n H_{2} O \to {F e}_{2} O_{3} + n H_{2} O$
C. Flux	c. ${C r}_{2} O_{3} + 2 A l \to {A l}_{2} O_{3} + 2 C r$
D. Thermite	d. $S i O_{2} + F e O \to F e S i O_{3}$

Which of the following is not an illustration of a smelting method?2NaCl(fused)+electric energy→2Na+Cl2Al2O3+3C→2Al+3CO2ZnS+3O2→2ZnO+2SO2CuO+H2→Cu+H2O

Which of the following is not an illustration of a smelting method?
$2 N a C l (f u s e d) + e l e c t r i c e n e r g y \to 2 N a + {C l}_{2}$
${A l}_{2} O_{3} + 3 C \to 2 A l + 3 C O$
$2 Z n S + 3 O_{2} \to 2 Z n O + 2 {S O}_{2}$
$C u O + H_{2} \to C u + H_{2} O$