Question

Extraction of gold and silver involves leaching the metal with CN⁻ ion. The metal is recovered by ..........
(a) displacement of metal by some other metal from the complex ion.
(b) roasting of metal complex.
(c) calcination followed by roasting.
(d) thermal decomposition of metal complex.

Answer 1

(a) Is the correct answer because gold and silver are less reactive and can be displaced by other element.

plz make brainliest