Which reactions are oxidation-reduction reactions? check all that apply
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Ответ:
options C and D
Explanation: in Redox reaction (oxidation-reduction), oxidation numbers of Reactant and product are different.
In oxidation, oxidation state increases and decreases in the case of Reduction.
In C, oxidation state of C is increased from +3 in C3H6 to +4 in CO2 hence oxidation and oxidation of O2 Decreased from 0 to -2 in H2O, hence Reduction. So it is a redox reaction
Similarly in D, Fe: +3 to 0
Carbon : +2 to +4.
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