In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices:
Assertion : Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by a more electropositive metal..
Reason : Copper is extracted by hydrometallurgy.
Answer & explanation
Correct answer: option 2
Hydrometallurgy involves dissolving the ore in a suitable reagent (like water, dilute acids or sodium cyanide solution) followed by precipitation by a more electropositive metal. So, it is used for extraction of less electropositive metals like copper, silver, gold. Copper is extracted by hydrometallurgy.
Both assertion and reason are true and reason is not the correct explanation of assertion.