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Acidified K2 Cr2 O7 turns green by...

Acidified `K_2 Cr_2 O_7` turns green by

A

`SO_(2)`

B

CO

C

`SiO_(2)`

D

`HCl`

Text Solution

Verified by Experts

`K_(2)Cr_(2)O_(7)` turns green by `SO_(2)` due to its reduction
`K_(2)Cr_(2)O_(7)+H_(2)SO_(4)+3SO_(2) to K_(2)SO_(4)+underset("Green")(Cr_(2)(SO_(4))_(3))+H_(2)O`
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