ARCH-C-05: Oxidation State Assignment, Redox Disproportionation & Ionic Half-Equation Balancing

Evaluate each statement: (1) In elemental $\text{Cl}_2$, $\text{Cl}$ has oxidation state $0$; in $\text{NaCl}$ it is $-1$; in $\text{NaClO}$, $(+1) + x + (-2) = 0 \implies x = +1$ (Statement 1 is correct). (2) Because chlorine is simultaneously oxidised ($0 \rightarrow +1$) and reduced ($0 \rightarrow -1$), it undergoes disproportionation (Statement 2 is correct). (3) Oxygen has oxidation state $-2$ in all species here; only in peroxides ($\text{O}_2^{2-}$) is it $-1$ (Statement 3 is incorrect) (~120s).