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?

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 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?

Which environmental concern is most directly reduced by replacing high-temperature smelting with phytomining or bioleaching for low-grade ores?

Which of the following is a common disadvantage of phytomining and bioleaching compared with large-scale smelting?

A soil contains a low concentration of copper. Which sequence of steps best represents a phytomining route to recover copper?

Why might an operator choose bioleaching for copper rather than directly using conventional cyanide leaching?

An economist compares two options to treat low-grade copper ore: conventional smelting or bioleaching + SX–EW. Which factor should be included in a life-cycle cost comparison that favors bioleaching?

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

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

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