A) \[Cr{{O}_{3}}\]
B) \[CrC{{l}_{3}}\]
C) \[Cr{{O}_{2}}C{{l}_{2}}\]
D) \[C{{r}_{2}}{{O}_{3}}\]
Correct Answer: C
Solution :
[c] Solid potassium dichromate when heated with concentrated sulphuric acid and a soluble chloride gives orange red vapours of a volatile oily liquid \[Cr{{O}_{2}}C{{l}_{2}}\] \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}+4NaCl+6{{H}_{2}}S{{O}_{4}}\] \[\underset{chromyl\text{ }chloride}{\mathop{\xrightarrow{{}}2KHS{{O}_{4}}}}\,+4NaHS{{O}_{4}}+2Cr{{O}_{2}}C{{l}_{2}}\]
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