CUET UGChemistryMCQ
Q36. In which of the following cases there is a change in oxidation number? (a) Aqueous solution of CrO42- is acidified (b) SO2 gas is passed through acidified Cr2O3- solution (c) Cr2O72- solution is made alkaline (d) CrO2Cl2 is dissolved in NaOH

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