In the reaction, 4 M+8 CN^-+2 H_2 O +O_2 longrightarrow 4 [M(CN)_2 ]+4 OH^- identify the metal M .

Correct answer: (C) Silver. 4 Ag+8 CN^-+2 H_2 O+O_2 longrightarrow 4 [Ag(CN)_2 Γ^-+4 OH^- . This process is called cynide process. It is used in the extraction of silver from argentite (Ag_2 ~S ) .

Q23 / 170 · Manipal (MET) 2015 · Chemistry

In the reaction, $\begin{aligned} 4 M+8 \mathrm{CN}^{-}+2 \mathrm{H}_2 \mathrm{O} & +\mathrm{O}_2 \\ & \longrightarrow 4\left[M(\mathrm{CN})_2\right]+4 \mathrm{OH}^{-}\end{aligned}$ identify the metal $M$.

A
Copper
B
Iron
Correct answer
C
Silver
D
Zinc

Solution

$4 \mathrm{Ag}+8 \mathrm{CN}^{-}+2 \mathrm{H}_2 \mathrm{O}+\mathrm{O}_2 \longrightarrow 4\left[\mathrm{Ag}(\mathrm{CN})_2 \Gamma^{-}+4 \mathrm{OH}^{-}\right.$ This process is called cynide process. It is used in the extraction of silver from argentite $\left(\mathrm{Ag}_2 \mathrm{~S}\right)$.

Hence, the correct answer is option: 'C'.

In the reaction, $\begin{aligned} 4 M+8 \mathrm{CN}^{-}+2 \mathrm{H}_2 \mathrm{O} & +\mathrm{O}_2 \\ & \longrightarrow 4\left[M(\mathrm{CN})_2\right]+4 \mathrm{OH}^{-}\end{aligned}$ identify the metal $M$.

Solution

More Coordination Compounds Questions