Q3. In the reaction \( \ce{2H2O2 -> 2H2O + O2} \), what is the oxidizing agent?A. \( \ce{H2O} \)B. \( \ce{O2} \)C. \( \ce{H2O2} \)D. None of these
Q4. In the reaction \( \ce{2Fe + 3Cl2 -> 2FeCl3} \), what is the reducing agent?A. \( \ce{Cl2} \)B. \( \ce{Fe} \)C. \( \ce{FeCl3} \)D. None of these
Q5. Which of the following reactions involves the addition of oxygen to a substance, classifying it as an oxidation process?A. \( \ce{2Mg + O2 -> 2MgO} \)B. \( \ce{2HgO -> 2Hg + O2} \)C. \( \ce{H2 + Cl2 -> 2HCl} \)D. \( \ce{CH4 + 2O2 -> CO2 + 2H2O} \)
Q6. Which reaction involves a redox process where the oxidizing agent is a metal oxide?A. \( \ce{2Na + Cl2 -> 2NaCl} \)B. \( \ce{S + O2 -> SO2} \)C. \( \ce{NiO + H2 -> Ni + H2O} \)D. \( \ce{2H2O2 -> 2H2O + O2} \)
Q7. In the reaction \( \ce{2KMnO4 + 16H2SO4 + 10NaCl -> 5Cl2 + 2MnSO4 + 8H2O + 5Na2SO4 + K2SO4} \), how many electrons are transferred?A. 5B. 8C. 12D. 10
Q8. In the reaction \( \ce{2H2S + SO2 -> 3S + 2H2O} \), which species is oxidized?A. \( \ce{H2S} \)B. \( \ce{SO2} \)C. \( \ce{S} \)D. \( \ce{H2O} \)
Q9. What is the change in oxidation number of sulfur in the reaction \( \ce{SO2 + H2O -> H2SO3} \)?A. +2B. 0C. -2D. +4
Q10. In \( \ce{2Ga + 3Cl2 -> 2GaCl3} \), which species acts as the reducing agent?A. \( \ce{Ga} \)B. \( \ce{Cl2} \)C. \( \ce{GaCl3} \)D. None of these