Which one of the following statement is ...

Which one of the following statement is CORRECT when `SO_2` is passed through acidified `K_2 Cr_2 O_7` solution?

A

`SO_2`is reduced.

B

Green `Cr_2 (SO_4)_3` is formed.

C

The solution turns blue.

D

The solution is decolourized.

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The correct Answer is:

B

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