Question
Chemistry Question on d -and f -Block Elements
Amphoteric oxides of Mn and Cr are
A
MnO and CrO
B
Mn2O3 and Cr2O3
C
MnO2 and Cr2O3
D
Mn2O7 and CrO3
Answer
MnO2 and Cr2O3
Explanation
Solution
MnO2 and Cr2O3 are amphoteric. MnO is basic. Mn2O3 is weakly basic. Mn2O7 is strongly acidic. CrO is basic while CrO3 is acidic.