Chemistry - Metallurgy Question with Solution | TestHub

ChemistryMetallurgyExtraction of MetalsMedium2 minQB

ChemistryMediumsingle choice

Which of the following statements is correct

Options:

Answer:

Solution:

Leaching of gold with CN⁻ (cyanide) is an oxidation reaction: $4 A u + 8 C N^{-} + O_{2} + 2 H_{2} O \to 4 [A u (CN)_{2}]^{-} + 4 O H^{-}$ . Zinc precipitates gold by reduction: $2 [A u (CN)_{2}]^{-} + Z n \to 2 A u + [Z n (CN)_{4}]^{2 -}$ . Thus, both (A) and (C) are correct.

Stream:JEESubject:ChemistryTopic:MetallurgySubtopic:Extraction of Metals

⏱ 2mℹ️ Source: QB

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