Chromyl chloride test is shown when the following compound is heated along the ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ and cone. ${\mathrm{H}}_2{\mathrm{SO}}_4$ ?

$\mathrm{KCl}$ compound is heated along the ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ and cone. ${\mathrm{H}}_2{\mathrm{SO}}_4$ 

A qualitative analytical test for chromium chloride is used to determine the structure of ${\mathrm{Cl}}^{-}$ ions. To further help you understand the test, let's look at an example. Potassium chromate ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ and concentrated sulfuric acid are heated with a sample of salt that contains chlorine ${\mathrm{H}}_2{\mathrm{SO}}_4$

Hence option A is correct