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B
Brownish red precipitate of HgCO3⋅3HgO is formed
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C
Reddish brown precipitate of HgCO3⋅3HgO is formed
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D
Blue ppt. of is Hg4O4CO3 formed
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Solution
The correct option is C Reddish brown precipitate of HgCO3⋅3HgO is formed Option (C) is correct. When HgCl2 reacts with CO2−3 anion, then reddish brown precipitate of HgCO3⋅3HgO is formed.