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Which of the following is amphoteric?(a) CrO(b) Cr2O3(c) CrO5(d) CrO3I got this question by my school teacher while I was bunking the class.Asked question is from D and F-Block Elements topic in division D and F-Block Elements of Chemistry – Class 12

Answer»

The CORRECT option is (b) Cr2O3

Best explanation: CHROMIUM(atomic no.24, symbol-Cr) forms many OXIDES. Some of its common oxidation states are +2, +3 and +6. Chromium (III) OXIDE (green in colour) is amphoteric, i.e., it can react as both acid and BASE. Its formula is Cr2O3.



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