Question

The following are some statements about galvanic cell.

1) The cell reaction will be obtained by summing up the reactions in the two half cells.

2) $E^0{}_{Cell}=E^0{}_{Cathode}-E_{Anode}^0$

3) $E{{}_{Cell}}^0=E_{\text{reduction electrode}}^0-E_{\text{oxidation electrode}}^0$

4) $E^0{}_{Cell}=E^0{}_{L.H.E}-E^0{}_{R.H.E}$

The correct combination is :

• A. only I and III are correct
• B. only I and II are correct
• C. only I,II,III are correct
• D. all are correct

Answer 1

Answer: (C)

only I,II,III are correct

Option 1 is correct. The overall cell reaction is equal to the sum of two half cell reactions.

Option 2 is correct. The cell potential is equal to the difference in half cell potentials of cathode and anode.

Option 3 is correct. The cell potential is equal to the difference in half cell potentials of reduction electrode and oxidation electrode.

Option 4 is incorrect. The cell potential is equal to the difference in half cell potentials of the right-hand electrode and left-hand electrode.