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Which of the following statements applies during the electrolysis of sodium hydroxide solution using platinum...

Chemistry
JAMB 1979

Which of the following statements applies during the electrolysis of sodium hydroxide solution using platinum electrodes?

  • A. Na+ ions are discharged at the cathode
  • B. Hydrogen ions are discharged at the cathode
  • C. the concentration of sodium hydroxide decrease at both electrode compartments
  • D. the concentration of sodium hydroxide increases at the cathode only
  • E. the concentration of sodium hydroxide increases at the anode only
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Correct Answer: Option B
Explanation

Electrolysis of conc NaOH using platinum elcetrodes:

At the cathode, Hydrogen gas is evolved

at the anode, Oxygen gas is evolved.

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