Question

________ requires an external current to make a redox reaction spontaneous.

• A. Voltaic cell
• B. Electrolytic cell
• C. Geiger counter
• D. pH meter
• E. Calorimeter

Answer 1

Answer: (B)

Electrolytic cell

Electrolytic cell requires an external current to make a redox reaction spontaneous.
Electrolytic cell is an electrochemical cell in which a nonspontaneous reaction is forced to occur by passing a direct current from an external source into the solution. Thus electrical energy is converted into chemical energy. The cells used for the decomposition of water into hydrogen and oxygen, for the purification of metals, for metal plating are the electrolytic cells.