In Nelson’s cell, Cathode is:

• (a) graphite
• (b) copper tube
• (c) porous steel vessel
• (d) iron task

In Nelson's cell, the cathode is typically a graphite rod. This material is used because it is a good conductor of electricity and can withstand the chemical reactions occurring during the electrolysis process.

Understanding the Components

Here’s a brief overview of the options:

• Graphite: Used as the cathode for its conductivity.
• Copper tube: Generally not used as a cathode in this setup.
• Porous steel vessel: Not suitable for the cathode in this context.
• Iron: While it can conduct electricity, it is not the preferred choice for the cathode in Nelson's cell.

Why Graphite?

Graphite's ability to handle high temperatures and its resistance to corrosion make it an ideal choice for the cathode in electrochemical cells like Nelson's.