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When SO2 gas is passed through an acidif...

When `SO_2` gas is passed through an acidified solution of `K_2 Cr_2 O_7`, the solution turns ___ in colour.

A

the solution becomes blue

B

the solution becomes colourless

C

`SO_2` is reduced

D

green `Cr_2(SO_4)_3` is formed

Text Solution

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The correct Answer is:
D
`K_2Cr_2O_7 + H_2SO_4 + 3SO_2 to K_2SO_4 + Cr_2(SO_4)_3 + H_2O`
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