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When sulphur dioxide gas is passed throu...

When sulphur dioxide gas is passed throught acidified potassium dichromate solution, the colour of the solution changes from:

A

orange to blue

B

orange to green

C

green to orange

D

orange to colourless

Text Solution

Verified by Experts

The correct Answer is:
B
`K_2Cr_2 O_7 + 4H_2SO_4 to K_2SO_4 + underset"Green"(Cr_2(SO_4)_3) + 4H_2O + 3[O]`
`SO_2 + [O] + H_2O to H_2SO_4`
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