Following reactions take place during extraction of gold. 4Au + 8CN- + 2H2O + O2 → 4[Au(CN)2]- + 4OH- 2[Au (CN)2]- + Zn → 2Au + [Zn(CN)4]2- Zinc in the extraction of gold acts as a/an

Question

Following reactions take place during extraction of gold. 4Au + 8CN- + 2H2O + O2 → 4[Au(CN)2]- + 4OH- 2[Au (CN)2]- + Zn → 2Au + [Zn(CN)4]2- Zinc in the extraction of gold acts as a/an (A) oxidising agent (B) flux (C) reducing agent (D) decomposing agent

Tardigrade Admin · Accepted Answer

4 Au +8 CN -+2 H 2 O + O 2 longrightarrow 4[ Au ( CN)2]-+4 OH - 2[ Au ( CN )2]-+ underset0Zn longrightarrow 2 Au + underset+2[ Zn ( CN )4]2- In the above reaction, Zinc is changing its states from 0 to +2 so zinc is getting oxidized and it acts as reducing agent.

Q. Following reactions take place during extraction of gold.
$4 A u + 8 C N^{-} + 2 H_{2} O + O_{2} \to 4 [A u (CN)_{2}]^{-} + 4 O H^{-}$
$2 [A u (CN)_{2}]^{-} + Z n \to 2 A u + [Z n (CN)_{4}]^{2 -}$
Zinc in the extraction of gold acts as a/an

oxidising agent

flux

reducing agent

decomposing agent

$4 A u + 8 C N^{-} + 2 H_{2} O + O_{2} ⟶ 4 [A u (CN)_{2}]^{-} + 4 O H^{-}$
$2 [A u (CN)_{2}]^{-} + 0 Z n ⟶ 2 A u + + 2 [Z n (CN)_{4}]^{2 -}$
In the above reaction, Zinc is changing its states from 0 to $+ 2$ so zinc is getting oxidized and it acts as reducing agent.

Q. Following reactions take place during extraction of gold. 4Au+8CN−+2H2​O+O2​→4[Au(CN)2​]−+4OH− 2[Au(CN)2​]−+Zn→2Au+[Zn(CN)4​]2− Zinc in the extraction of gold acts as a/an