Q1. In the reaction \( \ce{2P + 3H2O -> PH3 + H3PO3} \), what is the reducing agent?A. \( \ce{H2O} \)B. \( \ce{P} \)C. \( \ce{PH3} \)D. \( \ce{H3PO3} \)
Q3. In \( \ce{Bi2O3 + 3C -> 2Bi + 3CO} \), how many electrons are gained per bismuth atom during reduction?A. 3B. 2C. 1D. 4
Q4. In \( \ce{5FeS + 9O2 -> Fe2O3 + 2Fe2(SO4)3} \), what is the total change in oxidation number of sulfur per mole of \( \ce{FeS} \)?A. +6B. +4C. +8D. +2
Q8. Which reaction involves a redox process where the oxidizing agent loses oxygen without electron transfer to a metal?A. \( \ce{SO3 + S -> 2SO2} \)B. \( \ce{Fe2O3 + 3C -> 2Fe + 3CO} \)C. \( \ce{MnO2 + 4HCl -> MnCl2 + Cl2 + 2H2O} \)D. \( \ce{CuO + H2 -> Cu + H2O} \)
Q9. In \( \ce{4H2O + 2F2 -> 4HF + O2} \), how many electrons are transferred per molecule of \( \ce{F2} \)?A. 1B. 4C. 3D. 2