Incorrect Statement among the following is (JEE mains memory based shift-1 23/01/2025)

\({\mathrm{SO}}_{2}\) acts as oxidizing agent but not reducing agent

\({\mathrm{NO}}_{2}\) exist as a dimer

\({\mathrm{PF}}_{5}\mathrm{exists}\mathrm{but}{\mathrm{NF}}_{5}\) does not

\({\mathrm{PH}}_{3}\) has lower proton affinity than \({\mathrm{NH}}_{3}\)