MCQ practice · SSC Chemistry Board questions · Chapter 7: Chemical Reactions
Which of the following is an oxidizing agent?
Think it through first, then pick an option.
- a O₂
- b H₂
- c H₂S
- d CO
Answer and explanation
Correct answer: a O₂
In combustion O₂ accepts electrons, so it is an oxidant.
Why the other options are wrong
- b H₂: H₂ is usually oxidized (e.g. burning to water), so it is a reductant.
- c H₂S: The S²⁻ of H₂S gives electrons, so it is a reductant.
- d CO: The carbon in CO can be oxidized further; the oxidant is O₂.
Your account is open, so all 30,000+ MCQs from every chapter are yours. Start practising SSC Chemistry →
Want to keep going?
A free account carries you on to the next questions and opens 30,000+ MCQs from every chapter. Join before launch and Chirkut bundles are 60% off.
The ones you missed, worth one more look