Question

Explain chromyl chloride test with equation.

Answer 1

When salt containing chloride is treated with $K_{2}C{r}_2{O}_7$ and con. $H_{2}S{O}_4$ reddish orange vapours of chromyl chloride are obtained.
$K_{2}C{r}_2{O}_7+4KCl+6H_{2}S{O}_4\to \underset{Chromylchloride}{2Cr{O}_{2}C{l}_2+6KHS{O}_4}+3H_{2}O$
This reaction is used in the detection of chloride ions in qualitative analysis.