The incorrectstatement in respect of chromyl chloride test is

1.	The incorrectstatement in respect of chromyl chloride test is
Answer» formation of lead chromate formation fo CHROMYL chloride liberation of chlorine formation of red vapours Solution :Chromyl chloride test is used to confirm the presence of `Cl^(-)` in qualitative inorganic anaylis. When a small amount of the substance (salt) is heated with conc. `H_(2)SO_(4)` in presence of `K_(2)Cr_(2)O_(7)`, deep red vapours of chromyl chloride are EVOLVED. `NaCl+H_(2)SO_(4)toNaHSO_(4)+HCl` `K_(2)Cr_(2)IO_(7)+2H_(2)SO_(4)to2KHSO_(4)+2CrO_(3)+H_(2)O` `CrO_(3)+2HCl to underset("chromyl chloride")(CrO_(2)Cl_(2))+H_(2)O` These vapours are passed through NaOH solution and yellow coloured solution of `Na_(2)CrO_(4)` is obtained. `CrO_(2)Cl_(2)+4NaOHtounderset ("Yellow colour")(Na_(2)CrO_(4))+2NaCl+2H_(2)O` This yellow solution is NEUTRALISED with acetic acid and on addition of lead acetate gives a yellow ppt. of lead chromate `Na_(2)CrO_(4)+Pb(CH_(3)COO)_(2)tounderset("Yellow ppt.")(PbCrO_(4))+2CH_(3)COONa`

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