Core Reactions: Balancing Redox Reactions in Acidic Medium

Core Reactions: Balancing Redox Equations

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Practice Questions: Multiple Choice Questions

4. NS04/26. In which change does oxidation occur?

A. CH3CHO àCH3CH2OH

B. CrO42- à Cr2O72-

C. SO42- à SO32-

D. NO2- à NO3-

5. NS04/25. Consider the following reaction.

H2SO3(aq) + Sn4+(aq) + H2O(l) à Sn2+(aq) + HSO4- (aq) + 3H+(aq)

Which statement is correct?

A. H2SO3 is the reducing agent because it undergoes reduction.

B. H2SO3 is the reducing agent because it undergoes oxidation.

C. Sn4+ is the oxidizing agent because it undergoes oxidation.

D. Sn4+ is the reducing agent because it undergoes oxidation.