Among the following oxide of p-block elements, number of oxides having amphoteric nature is Cl₂O₇$Cl_2O_7$, CO$CO$, PbO₂$PbO_2$, N₂O$N_2O$, NO$NO$, Al₂O₃$Al_2O_3$, SiO₂$SiO_2$, N₂O₅$N_2O_5$, SnO₂$SnO_2$

Core Logic

Electron gain enthalpy (ΔegH$\Delta_{eg}H$) values are considered with their signs when ordering from largest to smallest algebraically.

Arranging these algebraically from highest to lowest: +96 > -200 > -325 > -333$+96 > -200 > -325 > -333$ Thus, Ar > S > Br > F$Ar > S > Br > F$, which corresponds to A > D > B > C$A > D > B > C$.

Pattern Recognition

Noble gases always have positive electron gain enthalpies (highest algebraically). Halogens have highly negative values (lowest algebraically). Fluorine is highly negative, Bromine is slightly less negative. Sulfur sits in between.

Chapter Mix

Class 11 Chemistry: Classification of Elements and Periodicity in Properties