Question

Assertion :Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by more electropositive metal. Reason: Copper is extracted by hydrometallurgy.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is C Assertion is correct but Reason is incorrect

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.
Less reactive gold and silver are extracted by hydrometallurgy. Their ores are dissolved in 0.5% solution of $NaCN$ in presence of air. These metals are separated from the solution by adding more reactive metals such as zinc or magnesium.
Copper is extracted by pyrometallurgy.
Assertion is correct but Reason is incorrect.