Chemistry - Surface Chemistry Question with Solution | TestHub

Gold sol can be obtained by the reduction of soluble gold salt with$\mathrm{S}\mathrm{n}\mathrm{C}{\mathrm{l}}_2$or hydrazine or formaldehyde.
$2\mathrm{A}\mathrm{u}\mathrm{C}{\mathrm{l}}_3+3\mathrm{S}\mathrm{n}\mathrm{C}{\mathrm{l}}_2\to \underset{\left(\mathrm{s}\mathrm{o}\mathrm{l}\right)}{2\mathrm{A}\mathrm{u}}+3\mathrm{S}\mathrm{n}\mathrm{C}{\mathrm{l}}_4$