Which reaction is a redox reaction?

1. HCI+H2O=H3O^+ +CI^-
2. H2SO4+2KOH=K2SO4+2H2O
3. CH4+2O2=CO2+2H2O
4. Fe^2+ +2OH^- =Fe(OH)2

I chose number 3, is this correct?

1 answer

Yes, that is correct.

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