Which of the following salts show chromyl chloride test?

$\mathrm{KCI}$, ${\mathrm{CrCl}}_3$, ${\mathrm{FeCl}}_3$ salts show chromyl chloride test.

In the qualitative analysis, chloride ions are found using the chromyl chloride test. Chromyl chloride vapors of a red color are produced when any chloride salt, such as sodium chloride, is heated in the presence of acidified potassium dichromate. It validates that salt's chloride ion content.

Hence, options A, B and D are correct.