1. Tardigrade
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  3. Chemistry
  4. Name the metal M, which is extracted on the basis of following equations. 4M(s) + 8CN-(aq) + 2H2O(aq) + O2(g) → 4[M(CN)2]-(aq) + 4OH-(aq) 2[M(CN)2]-(aq) + Zn(s) → [Zn(CN)4]2-(aq) + 2M(s)

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Q. Name the metal $M$, which is extracted on the basis of following equations.
$4M_{(s)} + 8CN^-_{(aq)} + 2H_2O_{(aq)} + O_{2(g)} \to 4[M(CN)_2]^-_{(aq)} + 4OH^-_{(aq)}$
$2[M(CN)_2]^-_{(aq)} + Zn_{(s)} \to [Zn(CN)_4]^{2-}_{(aq)} + 2M_{(s)}$

General Principles and Processes of Isolation of Elements

Solution:

$4Au + 8 NaCN + 2H_2O + O_2 \to $
$4Na[Au(CN)_2] + 4NaOH$
$2Na[Au(CN)_2] + Zn \to Na_2[Zn(CN)_4] + 2Au$