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A colorless inorganic compound impart a green color to flame. It’s solution gives white precipitate with `H_2SO_4`, when it is heated with `K_2Cr_2O_7` and coc `H_2SO_4` a red vapour is evolved. The oxidation nuber of metal in red vapour is :

Text Solution

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The correct Answer is:
6
`K_(2)Cr_(2)O_(7)+H_(2)SO_(4)+BaCl_(2)rarr underset("red vapour")(CrO_(2)Cl_(2))`
Oxidation state of `Cr` in `CrO_(2)Cl_(2)=+6`
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