Question

Which of the following compounds is formed when a mixture of `K_(2)Cr_(2) O_(7) and KCl` is heated with conc. `H_(2)SO_(4)` ?
A. `CrO_(2)Cl_(2)`
B. `CeCL_(3)`
C. `CrOCl_(2)`
D. `CrO_(2)Cl_(2)`

Answer 1

Correct Answer - A
Red vapours of `CrO _(2) Cl_(2)` are obtained.
`K_(2) Cr_(2) O_(7)+ 2H_(2)SO_(4)to KHSO_(4) +2CrO_(3) +H_(2)O`
`KCl+H_(2) SO_(4) to KHSO_(4) +HCl`
`{:(CrO_(3)+ 2HCl to " "CrO_(2)Cl_(2) " "+H_(2)O), (" ""Chromyl chloride"),(" "("Red oily vapours")):}`