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O Level Chemistry Placement Tests: Certification Test 668

Polarization Study App & e-Book: MCQ 668

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MCQ: 668

Oxidation of Hydrogen Gas (H2) to prevent polarization occurs through

  1. paste of manganese oxide
  2. depolarizing mixture of manganese oxide and ammonium chloride
  3. powdered carbon
  4. carbon acting as the negative terminal
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