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Which of the following statements is correct?

1. HCl and SO2 are reducing agents and can reduce MnO4- to CO2.
2. HCl and SO2 are oxidizing agents and can oxidize MnO4- to CO2.
3. HCl and SO2 are reducing agents and can reduce MnO4- to Mn2+.
4. HCl and SO2 are oxidizing agents and can oxidize MnO4- to Mn2+.

Correct answer: HCl and SO2 are reducing agents and can reduce MnO4- to Mn2+.

Solution

HCl and SO2 act as reducing agents. They reduce MnO4- (permanganate ion) to Mn2+ in acidic medium, as MnO4- is a strong oxidizing agent.

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