The option(s) with only amphoteric oxides is(are)

The option(s) with only amphoteric oxides is(are)
  1. Cr2O3, CrO, SnO, PbO
  2. NO, B2O3, PbO, SnO2
  3. Cr2O3, BeO, SnO, SnO2
  4. ZnO, Al2O3, PbO, PbO2

Solution

(iii)  Cr2O3, BeO, SnO, SnO2

All are amphoteric oxides as they react with both acids as well as bases

(iv)  ZnO, Al2O3, PbO, PbO2

All are amphoteric oxides as they react with both acids as well as bases

Asked in: JEE Advanced 2017 (Paper 2)

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