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}

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{A l}_{2} O_{3} + 3 C \to 2 A l + 3 C O

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2 Z n S + 3 O_{2} \to 2 Z n O + 2 {S O}_{2}

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C u O + H_{2} \to C u + H_{2} O

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Solution

The correct option is A $2 N a C l (f u s e d) + e l e c t r i c e n e r g y \to 2 N a + {C l}_{2}$
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.

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Similar questions

2 Z n S + 3 O_{2} \to 2 Z n O + 2 S O_{2}

2 Z n + O_{2} ⟶ 2 Z n O; Δ G^{o} = - 616 J . . (i)

2 Z n + 2 S ⟶ 2 Z n S; Δ G^{o} = - 293 J . . . (i i)

2 S + 2 O_{2} ⟶ 2 S O_{2} (g); Δ G^{o} = - 408 J . . (i i i)

Δ G^{o}

2 Z n S + 3 O_{2} ⟶ 2 Z n O + 2 {S O}_{2}