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MHT CET Chemistry Electrochemistry 2026 MHT CET 2026 (16 April Shift 2)

MHT CET Chemistry Question (2026) — Solution

Question

Which of the following reactions takes place at anode during the electrolysis of molten NaCl?

Options

  1. A. Na ^+_ (l) + e ^- Na _ (l)
  2. B. Na _ (s) Na ^+_ (l) + e ^-
  3. C. Cl _ 2(g) + 2 e ^- 2 Cl ^-_ (l)
  4. D. 2 Cl ^-_ (l) Cl _ 2(g) + 2 e ^-

Answer

D. 2 Cl ^-_ (l) Cl _ 2(g) + 2 e ^-

Step-by-step solution

During the electrolysis of molten NaCl , the ions present are Na ^+ and Cl ^-. At the anode, oxidation takes place. The chloride ions ( Cl ^-) migrate to the anode and lose electrons to form chlorine gas. The reaction at the anode is: 2 Cl ^-_ (l) Cl _ 2(g) + 2 e ^- At the cathode, reduction takes place. The sodium ions ( Na ^+) migrate to the cathode and gain electrons to form liquid sodium. The reaction at the cathode is: Na ^+_ (l) + e ^- Na _ (l) Answer: 2 Cl ^-_ (l) Cl _ 2(g) + 2 e ^-

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