Q1. Which compound contains carbon with an oxidation number higher than in \( \ce{CH4} \)?A. \( \ce{C2H6} \)B. \( \ce{CH3OH} \)C. \( \ce{CHCl3} \)D. \( \ce{C2H2} \)
Q2. How many electrons are transferred in the balanced reaction \( \ce{2MnO4^- + 6I^- + 4H2O -> 2MnO2 + 3I2 + 8OH^-} \)?A. 2B. 4C. 8D. 6
Q3. In \( \ce{2HNO3 + 3H3AsO3 -> 2NO + 3H3AsO4 + H2O} \), how many electrons are transferred per mole of \( \ce{HNO3} \)?A. 2B. 4C. 3D. 6
Q4. Which reaction involves a disproportionation process with a halogen?A. \( \ce{2Na + Cl2 -> 2NaCl} \)B. \( \ce{3F2 + 3H2O -> 6HF + O3} \)C. \( \ce{Fe + Br2 -> FeBr2} \)D. \( \ce{2KI + Cl2 -> 2KCl + I2} \)
Q5. Which reaction involves a redox process where the reducing agent loses electrons without gaining oxygen?A. \( \ce{2Co + Br2 -> 2CoBr} \)B. \( \ce{2Mg + O2 -> 2MgO} \)C. \( \ce{C + O2 -> CO2} \)D. \( \ce{2CuO + CO -> 2Cu + CO2} \)
Q6. In the reaction \( \ce{2I2 + 2H2O -> 4HI + O2} \), which element is reduced?A. IodineB. OxygenC. HydrogenD. None of these
Q7. Which reaction involves a redox process where the oxidizing agent gains electrons without oxygen loss?A. \( \ce{2Na + Br2 -> 2NaBr} \)B. \( \ce{Fe2O3 + 3CO -> 2Fe + 3CO2} \)C. \( \ce{MnO2 + 4HCl -> MnCl2 + Cl2 + 2H2O} \)D. \( \ce{PbO + C -> Pb + CO} \)
Q8. In \( \ce{2Ag2O + C -> 4Ag + CO2} \), which element’s oxidation number changes by the largest magnitude?A. SilverB. OxygenC. CarbonD. None of these
Q9. In \( \ce{2VCl3 + Cl2 -> 2VCl4} \), how many electrons are lost per vanadium atom?A. 1B. 2C. 3D. 4
Q10. Which of the following is a disproportionation reaction?A. \( \ce{2Na + Cl2 -> 2NaCl} \)B. \( \ce{Fe + CuSO4 -> FeSO4 + Cu} \)C. \( \ce{3HNO2 -> HNO3 + 2NO + H2O} \)D. \( \ce{2KClO3 -> 2KCl + 3O2} \)