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

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

Why are alternative methods such as bioleaching particularly suitable for treating tailings and low-grade ores?

Which of the following best explains why cryolite (Na3AlF6) is added when electrolysing aluminium oxide in industry?

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?

During phytomining, which plant property is most desirable for a hyperaccumulator used to extract a metal?

Which analytical measurement would help determine whether phytomining has successfully concentrated a target metal in harvested biomass?

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

A mining company reports that switching from smelting to solvent-extraction electrowinning (SX–EW) after bioleaching reduced onsite CO2 emissions but increased use of organic solvents. Which trade-off does this illustrate?

A company plans to replace part of its aluminium production with aluminium recovered by recycling. Which environmental benefit is most likely from this change?

Which of the following describes a key step in phytomining after harvesting metal-accumulating plants?

Which property of a metal ore makes it a poor candidate for phytomining?