Chemistry - Complete P-block Question with Solution | TestHub

Reaction of gold with aqua regia produces${\mathrm{N}\mathrm{O}}_2$in the absence of air

Aqua regiais prepared by mixing conc.$\mathrm{H}\mathrm{C}\mathrm{l}$and conc.${\mathrm{H}\mathrm{N}\mathrm{O}}_3$in$3 :1\left(\mathrm{v}/\mathrm{v}\right)$ratio

Reaction of gold withaqua regiaproduces an anion having$\mathrm{A}\mathrm{u}$in$+3$oxidation state

The yellow colour of$aqua regia$is due to the presence of$\mathrm{N}\mathrm{O}\mathrm{C}\mathrm{l}$and${\mathrm{C}\mathrm{l}}_2$