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Which of the following involves a redox reaction?

1. Reaction of H2SO4 with NaOH
2. Production of ozone from oxygen in the atmosphere by lightning
3. Production of nitrogen oxides from nitrogen and oxygen in the atmosphere by lightning
4. Evaporation of water

Correct answer: Production of nitrogen oxides from nitrogen and oxygen in the atmosphere by lightning

Solution

The production of nitrogen oxides from nitrogen and oxygen involves the transfer of electrons, where nitrogen is oxidized and oxygen is reduced, making it a redox reaction.

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