Consider the reaction : H_2SO_ 3(aq) + Sn^ 4+ _ (aq) + H_2O_ (l) Sn^ 2+ _ (aq) + HSO_ 4(aq) ^- + 3H^+_ (aq) . Which of the following statements is correct ?

JEE Main 2014 Chemistry question

Consider the reaction : H_2SO_{3(aq)} + Sn^{4+}_{(aq)} + H_2O_{(l)} \to Sn^{2+}_{(aq)} + HSO_{4(aq)}^- + 3H^+_{(aq)}. Which of the following statements is correct ?

(1) is the oxidizing agent because it undergoes oxidation
(2) is the reducing agent because it undergoes oxidation
(3) is the reducing agent because it undergoes reduction
(4) is the reducing agent because it undergoes oxidationCorrect

Answer: (4)

Solution

Sulphur goes from +4 in to +6 in , so sulphurous acid is oxidised and is therefore the reducing

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Question ID VK-104652