JEE Main 2002Annual, Paper 1ChemistryEasyd- and f-Block Elements158× since 2002How do we differentiate between Fe³⁺ and Cr³⁺ in group III?AOption A. by taking excess of NH₄OH solutionBOption B. by increasing NH4+NH_4^+NH4+ ion concentrationCOption C. by decreasing OH⁻ ion concentrationDOption D. both (b) and (c)CheckSkip · show solution
