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At the anode of a chlor alkali cell the reaction produces

  • A.chlorine gas from chloride
  • B.hydrogen gas from the water
  • C.sodium metal at the surface
  • D.oxygen from hydroxide ions

Answer: A

Chloride is oxidised to chlorine, while hydrogen and hydroxide appear at the cathode. A little oxygen is also formed at the anode as an unwanted side reaction that lowers the current efficiency. Anode coatings are chosen to suppress it.

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