Question

which option correctly describes an oxidation-reduction reaction?

• creating water
• a transfer of electrons
• joining two molecules together
• breaking a chemical bond

Explanation:

• Oxidation - reduction (redox) reactions involve the transfer of electrons between species. In oxidation, a species loses electrons, and in reduction, a species gains electrons.
• "Creating water" is a characteristic of some reactions (like neutralization), but not specific to redox.
• "Joining two molecules together" describes processes like addition or condensation, not redox.
• "Breaking a chemical bond" is part of many reactions (like decomposition) but not unique to redox.

Answer:

B. a transfer of electrons