1) what happens during oxidation a) loss of electrons b) gain of electrons c) sharing of electrons d) splitting of atoms 2) oxygen usually has an oxidation number of a) -1 b) +1 c) +2 d) -2 3) what does the term “redox” stand for? a) reduction and explosion b) reaction and oxidation c) reduction and oxidation d) radiation and oxidation 4) what of the following is a real-life redox reaction? a) melting of ice b) rusting of iron c) dissolving sugar in water d) boiling of water 5) what is the oxidation number of manganese in MnO4-? a) +4 b) +6 c) +7 d) +2

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