Question

Choose the correct statement(s) for cathode electrode in electrochemical cell?

• A. Reduction occurs at cathode
• B. Cathode has positive polarity
• C. Cathode acts as a sink of electrons
• D. All of the above

Answer 1

The correct option is D All of the above

In an electrochemical cell, the process of oxidation and reduction takes place simultaneously within the system. The metal strip in the cell is known as electrode. These are electrical conductor used to make contact with a non-metallic part of a circuit.
Reactive metals when in contact with their aqueous solution, the ions in the solution have tendency to get deposited on the metal rod is called cathode.
$Eg:Cu\text{rod in}CuS{O}_4\text{solution}$
$C{u}^{2+}\left(aq\right)+2e^{-}\to C{u}^{2+}\left(s\right)\left(\text{at cathode}\right)$
Characteristics of cathode:
1. Reduction takes place at cathode.
2. Cathode acts as a sink of electrons.
3. Cathode has positive polarity.

Thus, statements (a), (b) and (c) are correct.