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Smelting

Which of the ...

Question

Which of the following process involves smelting?

2 P b S + 3 O_{2} \to 2 P b O + 2 S O_{2}

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A l_{2} O_{3} .2 H_{2} O \to A l_{2} O_{3} + 2 H_{2} O

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F e_{2} O_{3} + C O \to 2 F e + 2 C O_{2}

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C r_{2} O_{3} + 2 A l \to A l_{2} O_{3} + 2 C r + H e a t

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Solution

The correct option is C $F e_{2} O_{3} + C O \to 2 F e + 2 C O_{2}$
Smelting : The process of extraction of metal in its molten state by any reducing agent in presence of flux is called smelting.
For example : oxides of less electro - positive metals like Pb, Zn, Fe, Cu are reduced by any other reducing agents.
Reactions:
$F e_{2} O_{3} + 3 C O \to 2 F e + 3 C O_{2}$

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Similar questions

10 g

A l

2 A l + C r_{2} O_{3} \to A l_{2} O_{3} + 2 C r

2 A l + F e_{2} O_{3} \to A l_{2} O_{3} + 2 F e

A l_{2} O_{3}

C r_{2} O_{3}

F e_{2} O_{3}

- 1676 k J

- 1141 k J

- 822.2 k J

2 A l + F e_{2} O_{3} ⟶ 2 F e + A l_{2} O_{3}

F e_{2} O_{3}

A l_{2} O_{3}

- 196.5

- 399.1

Δ H^{\circ}

A l_{2} O_{3}

C r_{2} O_{3}

Δ H

2 A l + C r_{2} O_{3} \to 2 C r + A l_{2} O_{3}

The enthalpies of formation of $A l_{2} O_{3}$ and $C r_{2} O_{3}$ are $- 1569 K J$ and $- 1134 K J$ respectively. $Δ H$ for the reaction

$2 A l + C r_{2} O_{3} \to 2 C r + A l_{2} O_{3}$ is

F e_{2} O_{3} + 2 A l \to A l_{2} O_{3} + 2 F e

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