Question

The incorrect statement in respect of chromyl chloride test is:

• A. Formation of red vapours
• B. Formation of lead chromate
• C. Formation of chromyl chloride
• D. Liberation of chlorine

Answer 1

The correct option is D Liberation of chlorine

The chromyl chloride test entails heating a sample suspected of containing chloride with potassium dichromate and concentrated sulphuric acid. If chloride is present, chromyl chloride is formed and red fumes of $Cr{O}_{2}C{l}_2$ are evident. If there is no chloride present, no red fumes are produced. So there is no liberation of chlorine.