| \[{{H}_{2}}S{{O}_{3}}\left( aq \right)+S{{n}^{4+}}\left( aq \right)+{{H}_{2}}O\left( I \right)\] |
| \[\to S{{n}^{2+}}(aq)+HSO_{4}^{-}(aq)+3{{H}^{+}}(aq)\] |
| Which of the following statements is correct? |
A) \[S{{n}^{4+}}\] is the oxidizing agent because it undergoes oxidation
B) \[S{{n}^{4+}}\] is the reducing agent because it undergoes oxidation
C) \[{{H}_{2}}S{{O}_{3}}\] is the reducing agent because it undergoes oxidation
D) \[{{H}_{2}}S{{O}_{3}}\] is the reducing agent because it undergoes reduction
Correct Answer: C
Solution :
[c] \[{{H}_{2}}\overset{+4}{\mathop{S}}\,{{O}_{3}}(aq)+S{{n}^{4+}}(aq)+{{H}_{2}}O(l)\xrightarrow{{}}\] \[S{{n}^{2+}}(aq)+H\overset{+6}{\mathop{S}}\,O_{4}^{-}(aq)+3{{H}^{+}}\] Hence \[{{H}_{2}}S{{O}_{3}}\] is the reducing agent because it undergoes oxidation.
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