AIIMS 2004 Chemistry Galvanic Cells MCQ Question
Which of the following statements is true for the electrochemical Daniel cell?
Electrons flow from copper electrode to zinc electrode.
Current flows from zinc electrode to copper electrode.
Cations move toward copper electrode.
Cations move toward zinc electrode.
Correct Answer
Detailed Explanation
In Daniel cell, during the passage of electric current through external circuit, electrons flow from the zinc electrode to the copper electrode. At the zinc electrode, the zinc metal is oxidized to Zn2+ which go into the solution. The electrons released at the electrode travel through the external circuit to the copper electrode where they are used in the reduction of Cu2+ ions to metallic copper which is deposited on the electrode.
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