alleryStart learning →In the reaction between sodium and chlorine, sodium is oxidised, which means chlorine:
AIs also oxidised
BStays entirely unchanged
CActs as a spectator
DUndergoes reduction
Answer & Solution
Correct answer: D. Undergoes reduction
1. Oxidation and reduction always occur together in a redox process.
2. One species loses electrons and another gains them.
3. In this reaction, then, sodium is oxidized and chlorine undergoes reduction.
4. If both were oxidised, there would be nowhere for the electrons to go.
5. Some redox processes do not involve a clean transfer of electrons, but this one does.
_Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 4 'Stoichiometry of Chemical Reactions', sections 4.1-4.5_
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