Electron Flow in Electrolytic Cells

Steps:

• In an electrolytic cell, oxidation at the anode releases electrons, which flow externally to the cathode.
• The external circuit connects the anode to the positive terminal of the power source (arrow 1) and the cathode to the negative terminal (arrow 3).
• Arrow 2 likely indicates ion movement in the electrolyte, not electron flow.
• Thus, arrows 1 and 3 represent the external electron pathway.

Why C is correct:

• Electrons flow from anode to cathode via the external circuit, as defined by the direction of conventional current opposite to electron flow in electrolysis.

Why the others are wrong:

• A includes arrow 2, which shows ion migration, not electrons.
• B omits arrow 3, missing the cathode connection.
• D selects only arrow 2, ignoring the full external electron path.

Final answer: C