Oxidation Reduction MCQ

Below Oxidation Reduction quiz are Multiple Choice Questions (MCQs) type Quiz. These Oxidation Reduction MCQ Questions helps you to refresh your Oxidation Reduction, you can see the correct option by clicking on it. .
  • 1. In which substance does sulfur have a negative oxidation number?

    • Na2S
    • SO2
    • S
    • Both A & B
  • 2. In a reaction, copper is reduced; its number of electrons has:

    • Increased
    • Decreased
    • Remained Constant
    • Varies Randomly
  • 3. In the reaction 2Ca(s) + O2(g) --> 2CaO(s), calcium is __________

    • Reduced
    • Synthesized
    • Oxidized
    • None of the above