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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

Green `Cr_(2) (SO_(4))_(3)` is formed.

B

The solution turns blue.

C

The solution is decolourized.

D

`SO_(2)` is reduced

Text Solution

Verified by Experts

The correct Answer is:
A
`K_(2) Cr_(2) O_(7) rarr Cr_(2) (SO_(4))_(3)` green solution is obtained whereas `SO_(2)` oxidises into sulphate `SO_(4)^(2-)`
`(K_(2) Cr_(2) O_(7) + SO_(2) + H_(2) SO_(4) rarr Cr_(2) (SO_(4))_(3) + H_(2) O + K_(2) SO_(4))`
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