JEE Main 202330 Jan, Evening shiftChemistryEasyd- and f-Block Elements158× since 2002Formulae for Nessler's reagent is :AOption A. KHgI3\mathrm{KHgI}_3KHgI3BOption B. HgI2\mathrm{HgI}_2HgI2COption C. KHg2I2\mathrm{KHg}_2 \mathrm{I}_2KHg2I2DOption D. K2HgI4\mathrm{K}_2 \mathrm{HgI}_4K2HgI4CheckSkip · show solution