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Q257) If KMnO4 is reduced by oxalic acid in an acidic medium, then oxidation number of Mn changes from [ DPMT 1999]




SOLUTION

Here Mn7+ in KMnO4 reduces to Mn2+ in MnSO4
Answer: (c)


Q258) Which ion is detected by Nessler's reagent? [ MP CEE 1999]




SOLUTION


Answer: (a)


Q259) In nitroprusside ion, the iron and NO exist as FeII and NO+ rather than FeIII and NO. these forms can be differentiated by ..[IIT 1998]



SOLUTION


Answer:(c)



Q260) CrO3 dissolves in aqueous NaOH to give ...[CBSE PMT 1997]



SOLUTION


Answer: (a)


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