Which of the following is true in the case of Zn-Cu cell ?
Correct answer: C. Zinc acts as an anode and copper as cathode
- A. The flow of electrons takes place from copper to zinc
- B. E0red of copper electrode is less than that of zinc electrode
- C. Zinc acts as an anode and copper as cathode
- D. All are correct
Explanation
In a Zn-Cu galvanic cell, zinc is oxidised at the anode and copper ions are reduced at the cathode, so zinc is the anode and copper is the cathode. Electrons therefore flow from zinc to copper, and Cu has the more positive standard reduction potential. The likely wrong choice is electron flow from copper to zinc, which reverses the direction of electron flow.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
Practise Electrochemistry
696 free Electrochemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Redox Reactions questions
The degree of dissociation of week electrolyte increases as________________?
In electrolytic solution conductance of electricity is due to _____________________?
Salt bridge transfers_______________?
The half cells are interconnected through________________?
Percentage of sulfuric acid in lead accumulator is__________________?
Capacity of one lead accumulator cell is___________________?