Eduprobe
Question:
Which of the following can react with K2Cr2O7?
CO32−
SO32−
SO42−
NO3−
Solution:
Correct option is A. SO32−
Solution:- (A) SO32−
Oxidation state of S in SO32− is +4. Hence can easily be oxidised when reacts with K2Cr2O7. All the other species are in their maximum oxidation state and hence will not react with K2Cr2O7.