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Question

Which of the following is true for electrochemical Daniel cell?


Your Answer
A
Electrons flow from copper electrode to zine electrode
Your Answer
B
Current flows from zinc electrode to copper electrode
Correct Answer
C
Cations move towards copper electrode
Your Answer
D
Cations move towards copper electrode

Solution

The correct option is D Cations move towards copper electrode
The half reactions of whole redox reactions are
ZnZn2++2eCu2++2eCu
As zinc is oxidizing, it melts to Zn2+ ions leaving the electrons is the rod which transfer to Cu rod which are used in reducing the Cu ions as Cu2++2eCu
So the electrons transfer from Zn rod to Cu rod.
So the current flow exactly opposite to the electron flow i.e., from Cu to Zn rod.
As Cu2+ ions getting reduced by accepting electrons.
To this to happen Cu2+ ions should move towards Cu rod and accept electrons. 
So cations moves towards Cu electrode.

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