Question

Which statement is true?

A. In a reaction, oxidation can occur independently of reduction.
B. A redox reaction involves either the transfer of an electron or a change in the oxidation state of an element.
C. In a redox reaction, any increase in the oxidation state of a reactant must be accompanied by a decrease in the oxidation state of a reactant.
D. If any of the reactants or products in a reaction contain oxygen, the reaction is a redox reaction.

Answer 1

Answer:

C

Explanation:

Inn Redox reaction electron transfer takes place between reducing and oxidizing agents. It is not necessary to have oxygen in the reaction, as any chemical species that can undergo electron transfer is enough.

the oxidation and reduction accompany each other, electron lost in oxidation reaction is gained in the reduction reaction.

Hence option C  that is  In a redox reaction, any increase in the oxidation state of a reactant must be accompanied by a decrease in the oxidation state of a reactant. is correct