Question

Which of the following compounds does not give positive chromyl chloride test?

• A. $Cu{Cl}_2$
• B. $Hg{Cl}_2$
• C. $Zn{Cl}_2$
• D. $C_6{H}_{5}N{H}_3^{+}{Cl}^{-}$

Answer 1

The correct option is B $Hg{Cl}_2$

$HgC{l}_2$ is covalent in nature and hence, does not produce $C{l}^{-}$ ions.

Therefore, the chromyl chloride test is negative for $HgC{l}_2$.

All other salts like $CuC{l}_2,ZnC{l}_2$ and $C_6{H}_{5}N{H}_3^{+}C{l}^{-}$ produce $C{l}^{-}$ ions and hence, give positive chromyl chloride test.

Hence,option B is correct.