The incorrect statement in respect of chromyl chloride test is
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: Chromyl chloride test is used to confirm the presence of 
in qualitative inorganic analysis.
When a small amount of the substance (salt) is heated with conc. 
in presence of 
, deep red vapours of chromyl chloride are evolved. 
Chromyl chloride
These vapours are passed through 
solution and yellow coloured solution of 
, is obtained.
Yellow colour
This yellow solution is neutralised with acetic acid and on addition of lead acetate gives a yellow ppt. of lead chromate.
Yellow ppt.
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