JEE Advanced 2017 · Paper 2, Chemistry question 13

• (A) $\ce{Cr2O3}$, BeO, SnO and $\ce{SnO2}$ are all amphoteric. ✓
• (B) CrO is basic. ✗
• (C) NO is neutral and $\ce{B2O3}$ is acidic. ✗
• (D) ZnO, $\ce{Al2O3}$, PbO and $\ce{PbO2}$ are all amphoteric. ✓

(A), (D)