During electrolysis, anions undergo……………. At the ………………..

Options

A. reduction, anode
B. oxidation, anode
C. oxidation, cathode
D. none of these

Explanation

**Step-by-Step Solution:**

1. **Understanding Electrolysis**: Electrolysis is a chemical process that uses electricity to drive a non-spontaneous reaction. It occurs in an electrolytic cell, which contains two electrodes: an anode and a cathode.

2. **Identifying the Electrodes**: In electrolysis, the anode is the positively charged electrode, while the cathode is the negatively charged electrode. The anode attracts anions (negatively charged ions), and the cathode attracts cations (positively charged ions).

3. **Movement of Anions**: During electrolysis, anions migrate towards the anode. This is because opposite charges attract; since the anode is positively charged, it attracts the negatively charged anions.

4. **Oxidation Reaction**: At the anode, oxidation occurs. Oxidation is the loss of electrons. For example, if we consider chloride ions (Cl⁻) as the anions, they will lose electrons at the anode to form chlorine gas (Cl₂).

5. **Conclusion**: Therefore, during electrolysis, anions undergo oxidation at the anode.

**Final Answer**: During electrolysis, anions undergo oxidation at the anode.

---