Gold is removed from the rock that contains it by a series of leaching operations that all involve the use of
A) sulfuric acid
B) nitric acid
C) arsenic
D) highly toxic cyanide salts
E) mercury

Question

Quizplus · Accepted Answer

Gold is usually extracted from ore using cyanide salts, which form complexes with gold ions in the ore. However, the use of cyanide can be hazardous to the environment and human health. Precautions must be taken to prevent the release of cyanide into the environment.

Gold Is Removed from the Rock That Contains It by a Series