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When K(2)Cr(2)O(7) is heated with conc. ...

When `K_(2)Cr_(2)O_(7)` is heated with conc. `H_(2)SO_(4)` in the presence of a soluble metal chloride, orange red vapours are produced. These are due to :

A

`Cr_2O_3`

B

`CrOCl_2`

C

`CrO_4^(2-)`

D

`CrO_2Cl_2`

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The correct Answer is:
D
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