Electrolysis of conc, aqueous solution of NaCI results at the anode:
Correct answer: C. Chlorine
- A. Sodium
- B. Hydrogen
- C. Chlorine
- D. Oxygen
Explanation
In the electrolysis of a concentrated aqueous solution of NaCl, chloride ions (Cl-) are oxidized at the anode to form chlorine gas (Cl2). This occurs because chloride ions are more readily oxidized than water molecules in this setting. As a result, chlorine is the primary product at the anode. At the cathode, water is reduced to form hydrogen gas (H2) and hydroxide ions (OH-), which can combine with sodium ions to form NaOH as a side product. Sodium metal is not produced because it reacts with water. Oxygen is not formed at the anode in significant amounts when chloride ions are present in high concentration.
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