Question

Which of the following processes involves the dissolution of the ore in a suitable reagent followed by precipitation of the metal by a more reactive metal?

(a) Froth floatation

(b) Casting

(c) Smelting

(d) Hydrometallurgy

This question was addressed to me during an interview.

My question is from Oxidation Reduction topic in portion General Principles and Processes of Isolation of Elements of Chemistry – Class 12

Answer 1

Right option is (a) Froth floatation

Easiest explanation: The process of extraction of metals by dissolving the ore in a suitable reagent followed by precipitation or displacement of the metal by a more reactive or more electropositive metal is called hydrometallurgy.