$Ag_2S + NaCN + Zn \rightarrow Ag$
This method of extraction of $Ag$ by complex formation and then its displacement is called:

In the process of leaching of gold by cyanide,what are the complexes $X$ and $Y$ respectively?
$4Au(s) + 8CN^-(aq) + 2H_2O(aq) + O_2(g) \to 4[Au(CN)_2]^-(aq) + 4OH^-(aq)$
$2[Au(CN)_2]^-(aq) + Zn(s) \to [Zn(CN)_4]^{2-}(aq) + 2Au(s)$
$X$ and $Y$ are:

The reaction for obtaining the metal $(M)$ from its oxide $(M_{2}O_{3})$ ore is given by
$M_{2}O_{3(s)} + 2 Al(\ell) \xrightarrow{\text{Heat}} Al_{2}O_{3}(\ell) + 2 M_{(s)}$,$(s = \text{solid}, \ell = \text{liquid})$
In this case,$M$ is

In the electrolysis of aluminium oxide,which of the following is added to accelerate the process?

The alumino-thermite process is used for the metallurgy of which metal?

Explain the reduction of metal oxides to metal.