Students should be able to evaluate alternative biological methodsof metal extraction, given appropriate information

Discuss the application of following in extraction of metals. Support your answer with suitable examples [3] [15] a. Blast furnace b. Pre-dominance area diagram c.Fluidized bed roasting

The process by which any metal is extracted from its ore is AreductionBelectrolysisCdisplacementDdecomposition

Which metal extraction process involves the use of heat and chemical reducing agents to obtain the metal from its ore?a. Electrolysisb. Pyrometallurgyc. Hydrometallurgyd. Aluminothermy

What method uses bacteria to help extract copper from low-grade copper ores?PhytominingReduction by carbonBioleachingElectrolysis2What type of plants does phytomining depend on? Plants that can absorb copper ions from soilPlants that can detoxify copper ionsPlants that can release copper ions into soilPlants that can make copper ions during photosynthesis3What two methods can be used to extract copper from a solution of copper sulfate produced by bioleaching or phytomining?Neutralisation or reduction by carbonNeutralisation or displacementElectrolysis or displacementElectrolysis or thermal decomposition4In the electrolysis of copper, which half equation shows what happens at the negative copper electrode? 2Cu2+(aq) + 2e– → 2Cu(s)2Cu(s) → 2Cu+(aq) + 2e–Cu(s) → Cu2+(aq) + 2e– Cu2+(aq) + 2e– → Cu(s)5What is the balanced symbol equation for the displacement reaction between copper sulfate and iron?Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)Fe(s) + CuSO4(aq) → FeS(aq) + CuO4(s)FeSO4(aq) + Cu(s) → Fe(s) + CuSO4(aq)Fe(s) + CuSO4(aq) → FeO4(aq) + CuS(s)6Which of the following is not an advantage of bioleaching and phytomining over the traditional methods of extracting copper from high-grade ores?Removes toxic copper from soilMore energy efficientDoes not require miningVery fast methods

Which reducing agent can be used in the extraction of metals placed at the top of the reactivityseries?