alleryWhich half-reaction from the notes is an example of reduction?
A$Zn \rightarrow Zn^{2+} + 2e^-$
B$Cu \rightarrow Cu^{2+} + 2e^-$
C$Cu^{2+} + 2e^- \rightarrow Cu$
D$Zn^{2+} \rightarrow Zn + 2e^-$
Answer & Solution
Correct answer: C. $Cu^{2+} + 2e^- \rightarrow Cu$
Reduction involves gain of electrons.
In $Cu^{2+} + 2e^- \rightarrow Cu$, copper ions gain electrons to form copper metal, so this is the reduction half-reaction.
Keep practising Unit 9A: Redox Processes & Electrochemical Cells
Browse all Unit 9A: Redox Processes & Electrochemical Cells questions for JEE Advanced, or explore more Chemistry topics.
Related questions