The moist SO2 has reducing character due to evolution of nascent hydrogen.
SO2+2H2O→H2SO4+2[H]Cl2 acts as bleaching agent, Cl2+H2O→HCl+HClO
Hypochlorous acid is unstable, It easily dissociates to form nascent oxygen.
HClO→HCl+[O] due to nascent oxygen it act as bleaching agent.
XeF2→ Linear, but XeF6→ distorted octahedral N2→ Very less reactive gas, and F2 highly reactive gas. NH3→ Strong base, HI→ Strong acid.