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Which one of the following statements is correct when SO2 is passed through acidified K2Cr2O7solution?

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By Expert Faculty of Sri Chaitanya
a
SO2 is reduced.
b
Green Cr2SO43 is formed.
c
The solution turns blue.
d
The solution is decolourised.

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detailed solution

Correct option is B

K2Cr2O7+H2SO4+3SO2→K2SO4+Cr2SO43+H2Oaq. Cr2SO43 is green coloured solution.


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