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Select total true statements (1)conc. H_2SO_4 in used to acidify KMnO_4 (2)In aq. medium Fe^(3+ )is more stable than Fe^(2+) (3)conc.HNO_3is usedto acidifyKMnO_ 4(4) commonproductof heatinginKMn O_ 4&K_ 2Cr _ 2O _7isO_ 2 (g )(5 )Ce O_ 2isgoodanalyticalagent(6)Sc does not showvariablevalency Options are

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Answer :C


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