When SO2 is passed into an acidified potassium dichromate solution, the oxidation numbers of sulphur and chromium in the final products respectively are:
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a
+6, +6
b
+6, +3
c
0, +3
d
+2, +3
answer is B.
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Detailed Solution
The redox reaction is : Cr2O72−+3SO2+2H+⟶2Cr3++3SO42− +H2O