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

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

Which cost factor is likely to make alternative methods (bioleaching, phytomining) attractive for low-grade ores?

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

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?

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

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?

Which consideration makes phytomining particularly attractive for waste dumps and mine tailings?

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?