Question

In a galvanic cell, oxidation always occurs at:

• A. The anode
• B. The cathode
• C. The salt bridge
• D. The electrolyte

Hint:

Remember the mnemonic: \[ \textbf{AN OX \; RED CAT} \] which means:
• ANode \( \rightarrow \) OXidation
• REDuction at CAThode

Answer 1

The Correct Option is A

Step 1 : Understanding the Question:
The question tests our fundamental knowledge of electrochemical cells, specifically asking at which electrode oxidation occurs in a galvanic cell. We must review the standard operational definitions of anodes and cathodes.
Step 2 : Key Formulas and Approach:
In electrochemistry, the definitions of electrodes are based on the reaction types occurring at their surfaces:

Oxidation is the loss of electrons.

Reduction is the gain of electrons.

By convention, the site of oxidation is always defined as the anode, and the site of reduction is always defined as the cathode. This convention is universal across all electrochemical systems.
Step 3 : Detailed Solution:

Recall that a galvanic cell utilizes spontaneous chemical reactions to produce electricity.

Examine the behavior at the anode: active species lose electrons (oxidation), sending them through the external circuit.

Examine the behavior at the cathode: species gain electrons (reduction) from the external circuit.

Confirm that this assignment (oxidation at the anode) is universal for all electrochemical and electrolytic cells.

Step 4 : Final Answer:
Oxidation always occurs at the anode, which corresponds to option (A).
\[ \boxed{\text{The anode}} \]