Alternative Methods Of Extracting Metals (ht Only) (GCSE Chemistry)

Which safety or environmental hazard is specifically associated with bioleaching heaps that operators must manage?

Which of the following best summarises why electrowinning (EW) is paired with solvent extraction (SX) after bioleaching?

Which of the following is the correct order of steps in a common alternative extraction pathway for copper from low-grade sulfide ore?

A copper mine produces low-grade ore containing copper sulfide. Which combination of methods could be used as an alternative route to extract copper with lower CO2 emissions than smelting?

A student claims: "Bioleaching produces no emissions and is therefore always environmentally superior to smelting." Which rebuttal is most accurate?

Which metal is typically extracted by electrolysis of a molten oxide rather than by reduction with carbon because it is more reactive than carbon?

Which of the following best describes the main chemical principle that allows bioleaching microorganisms to dissolve metal from ore?

Which of the following policy or regulatory measures would most encourage adoption of alternative, lower-emission extraction methods?

Which of the following metals is commonly recovered from solutions produced by bioleaching or acid leaching using solvent extraction followed by electrowinning?

Which of the following is an advantage of phytomining compared with traditional mining of low-grade ore?

In solvent extraction/electrowinning (SX-EW) used after bioleaching, what is the main purpose of the solvent extraction stage?