Comedk
Metallurgy
COMEDK 2020
MCQ+1 / -02020
During the extraction of gold the following reactions take place
\(\mathrm{Au + C{N^ - } + {H_2}O\buildrel {{O_2}} \over \longrightarrow [X]}\)
\(\mathrm{[X] + Zn\buildrel {} \over \longrightarrow [Y] + Au}\)
X and Y are respectively