Answer:
Sulphur is of
5th group. Thus, maximum oxidation state of sulphur will be +6 and minimum
oxidation state will be -2.
In\[{{H}_{2}}S\], sulphur is in -2 state. Thus, \[{{H}_{2}}S\]
can undergo oxidation only and it acts as a reductant only.
In\[S{{O}_{2}}\], sulphur is in +4 state. Thus, \[S{{O}_{2}}\]
can undergo both oxidation as well as reduction, i.e., it may act both as
oxidising and reducing agent. Ozone acts only as an oxidising agent because it
decomposes to give nascent oxygen.
\[{{O}_{3}}\rightleftharpoons {{O}_{2}}+[O]\]
In\[HN{{O}_{3}}\], nitrogen has maximum oxidation state
of+5; hence nitrogen can undergo only reduction, i.e., it can act only as
oxidising agent.
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