\(\quad \quad \quad \quad \quad \quad \quad\quad (+4) \quad \quad \quad (A)\)
Oxidation state of \('S'\) in \(SO _{4}^{2-}\)
\(=+6\)
(મુક્ત $CO$ માં $C-O$ બંધલંબાઇ $1.128\,\mathop A\limits^o $ છે.