An aqueous solution containing one mole of `HgI_(2)`  and two moles of `NaI` is orange in colour.
Channel: Doubtnut
Date: 2021-11-02

An aqueous solution containing one mole of `HgI_(2)`  and two moles of `NaI` is orange in colour. On addition of excess `NaI` the solution becomes colourless. The orange colour reappears on subsequent addition of `NaOCl`. Explain  with equations.