Question

Select the correct statements about the electrolysis.

• A. Electric current is used to drive a non spontaneous reaction.
• B. $\Delta G$ is positive for chemical process during electrolysis.
• C. Cations and anions move towards the anode and cathode respectively.
• D. Over voltage is generally associated with the anode in the electrolysis of $NaCl\left(aq\right)$.

Answer 1

Answer: (A), (B), (D)

The correct options are
A Electric current is used to drive a non spontaneous reaction.
B $\Delta G$ is positive for chemical process during electrolysis.
D Over voltage is generally associated with the anode in the electrolysis of $NaCl\left(aq\right)$.

A non-spontaneous reaction does not occur on its own. Hence it can be forced to occur by the application of an electric current.

During electrolysis, the process is non-spontaneous. Hence it has a positive value of $\Delta G$ .

Cations and anions move towards the cathode and anode respectively.

The rate of the transfer of electrons at the interface of the electrode and solution for two half reactions is slow. Hence over voltage is required.