Chemistry - Metallurgy Question with Solution | TestHub

ChemistryMetallurgyPurification of Ores, Calcination and roastingMedium2 minQB

ChemistryMediummultiple choice

CORRECT statement for leaching is/are :-

Answer:

A, B, C, D

Solution:

Leaching is a hydrometallurgical process.

A. Correct. Leaching is used for Ag, Au, and Al ores.

B. Correct. Ag and Au form soluble cyanide complexes: $4 Au + 8 CN^{-} + O_{2} + 2 H_{2} O \to 4 [Au (CN)_{2}]^{-} + 4 OH^{-}$ .

C. Correct. In Bayer's process, $Fe_{2} O_{3}$ (red mud) is insoluble in $NaOH$ .

D. Correct. $NaAlO_{2} + CO_{2} + 2 H_{2} O \to Al (OH)_{3} ↓ + NaHCO_{3}$ .

Stream:JEESubject:ChemistryTopic:MetallurgySubtopic:Purification of Ores, Calcination and roasting

⏱ 2mℹ️ Source: QB

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