Which one of the following is an amphoteric oxide (a) Mn2O7 (b) CrO (c) V2O4 (d) Cr2O3 Which one of the following is an amphoteric oxide (a) Mn2O7 (b) CrO (c) V2O4 (d) Cr2O3 December 1, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,