Which of the following oxides is amphoteric in character (a) CaO (b) CO2 (c) SiO2 (d) SnO2 Which of the following oxides is amphoteric in character (a) CaO (b) CO2 (c) SiO2 (d) SnO2 November 10, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,