What is aqua regia ?

Which sulphides are soluble only in aqua regia ?

State the composition of aqua regia . State which component is the oxidising agent in aqua regia.

The metal(s) soluble in aqua regia is (are)

Mercury on heating with aqua regia gives

Mercury on heating with aqua regia gives

Mercury on heating with aqua regia gives

The compound formed by reacting aqua regia with Pt

State why aqua regia dissolves gold , which in insoluble in all other acids.

CoS (black) obtained in group IV of salt analysis is dissolved in aqua regia and is treated with an excess of NaHCO_(3) and then Br_(2) water.An apple green coloured stable complex is formed. It is:

Write the balanced chemical equations for the following : (a) Pb_(3)O_(4) is treated with nitric acid. (b) Zinc oxide is treated with excess of sodium hydroxide solution. (c) Dilute nitric acid is slowly reacted with metallic tin. (d) Gold is dissolved in aqua regia. (e) Iron reacts with cold dilute nitric acid. (f) Sodium thiosulphate is added slowly to silver nitrate. (g) Heating of ZnCI_(2).2H_(2)O .