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Wednesday, March 16, 2022

HgCl2 does not give Chromyl Chloride test Why ?

The chromyl chloride test need heating a sample  containing chloride with potassium dichromate and concentrated sulfuric acid.

 If chloride is present, chromyl chloride is formed and red fumes of CrO2Cl2 are released  If there is no chloride present, no red fumes are produced. Chromyl Chloride not formed with fluorides, bromides, iodides and cyanides, it is only test specific for chlorides

Chromyl chloride test is given by only chloride salts which are infer whether there is halide predominantly  ionic while covalent chlorides such as HgCl2 do not generate Cl- ions thus won't give this test.

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