Consider the following process and identify in which pair both reactions produce same metal containing product. (I) Calcination of Malachite ; Calcination of Calamine ; (II) PbS + 2 PbO Δ ab se n ceo

Question

Consider the following process and identify in which pair both reactions produce same metal containing product. (I) Calcination of Malachite ; Calcination of Calamine ; (II)

$PbS + 2 PbO Δ ab se n ceo f ai r$

$PbS + PbSO_{4} Δ ab se n ceo f ai r$

(III) Roasting of Galena ;

Roasting of Sphalerite

(IV) Calcination of Calamine ;

Roasting of Sphalerite

Select CORRECT option for your answer

TestHub · Accepted Answer

The correct option is (D) II, IV.

Pair (II): Both self-reduction reactions ( $P b S + 2 P b O \to 3 P b + S O_{2}$ and $P b S + P b S O_{4} \to 2 P b + 2 S O_{2}$ ) produce metallic lead ( $P b$ ) as the product.

Pair (IV): Both the calcination of calamine ( $Z n C O_{3} Δ Z n O + C O_{2}$ ) and roasting of sphalerite ( $2 Z n S + 3 O_{2} Δ 2 Z n O + 2 S O_{2}$ ) produce zinc oxide ( $Z n O$ ).

Pairs (I) and (III): These pairs involve different metals (Copper/Zinc and Lead/Zinc respectively), yielding completely different products.

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