Which one of the following correctly represents the order of stability of oxides, X2O; (X = halogen)?

Strategy: Compare the stability of halogen oxides based on their formula type and periodic trends.

Step 1: Halogen Oxide Stability The order of stability for halogen oxides follows the trend: $\text{I > Cl > Br}$.

• Iodine oxides are stable due to the large size and high polarizability of Iodine (thermodynamic stability).
• Chlorine oxides are stable due to kinetic factors (many have $p\pi-d\pi$ bonding).
• Bromine oxides are the least stable as they lack both thermodynamic and kinetic stability factors.

Step 2: Order Selection Matching the given order $(\ce{I > Cl > Br})$ for oxides like $\ce{X2O}$ yields the answer.

$\boxed{\text{Answer: (Option) [c] $\ce{I > Cl > Br}$}}$