Reddish precipitate of Mercuric iodide and clear solution of Potassium chloride is produced
It is a white toxic salt of metal Mercury HgCl2.
Mercuric bromide or Mercuric Chloride impregnated paper react with Arsin gases, ans form a yellow stain. this is an indication of the presence of Arsenic in the sample being analysed.
HgCl2.
HgI2
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