Question

The incorrect statement in respect of Chromyl chloride test is

• A. formation of Chromyl chloride
• B. liberation of Chlorine
• C. formation of red vapours
• D. formation of lead chromate

Answer 1

Answer: (B)

liberation of Chlorine

Answer 2

$4 NaCl + K _{2} Cr _{2} O _{7}+3 H _{2} SO _{4} \longrightarrow K _{2} SO _{4}+2 Na _{2} SO _{4}+\underset{\text{chromyl chloride(reddish brown vapour) }}{2 CrO _{2} Cl _{2} \uparrow }+3 H _{2} O$
$CrO _{2} Cl _{2}+4 NaOH \longrightarrow 2 NaCl + Na _{2} CrO _{4}+2 H _{2} O$
$Na _{2} CrO _{4}+\left( CH _{3} COO \right)_{2} Pb \longrightarrow 2 CH _{3} COONa+ \underset{\text{lead chromate}}{PbCrO _{4}}$