Q1. In the reaction \( \ce{2Cr + 3CuSO4 -> Cr2(SO4)3 + 3Cu} \), what is the oxidizing agent?A. \( \ce{Cr} \)B. \( \ce{CuSO4} \)C. \( \ce{Cr2(SO4)3} \)D. \( \ce{Cu} \)
Q2. Which reaction is an example of a disproportionation redox process?A. \( \ce{2Na + Cl2 -> 2NaCl} \)B. \( \ce{3Br2 + 6NaOH -> 5NaBr + NaBrO3 + 3H2O} \)C. \( \ce{Fe + CuSO4 -> FeSO4 + Cu} \)D. \( \ce{2KClO3 -> 2KCl + 3O2} \)
Q3. In \( \ce{2HNO3 + 3H2S -> 2NO + 3S + 4H2O} \), what is the total number of electrons transferred per mole of \( \ce{HNO3} \)?A. 2B. 3C. 4D. 6
Q4. In the reaction \( \ce{2Na + Br2 -> 2NaBr} \), what is the reducing agent?A. \( \ce{Br2} \)B. \( \ce{Na} \)C. \( \ce{NaBr} \)D. None of these
Q6. Which of the following reactions involves both oxidation and reduction?A. \( \ce{HCl + NaOH -> NaCl + H2O} \)B. \( \ce{CaCO3 -> CaO + CO2} \)C. \( \ce{2PbO + PbS -> 3Pb + SO2} \)D. \( \ce{NaCl + KBr -> NaBr + KCl} \)
Q7. In \( \ce{2NaNO3 -> 2NaNO2 + O2} \), what is the total number of electrons transferred per mole of \( \ce{NaNO3} \)?A. 1B. 3C. 4D. 2
Q9. In \( \ce{HgCl2 + H2S -> Hg + S + 2HCl} \), which species is the reducing agent?A. \( \ce{HgCl2} \)B. \( \ce{H2S} \)C. \( \ce{Hg} \)D. \( \ce{HCl} \)
Q10. Which reaction involves a disproportionation process with a non-metal?A. \( \ce{2Na + Cl2 -> 2NaCl} \)B. \( \ce{3S + 6NaOH -> 2Na2S + Na2SO3 + 3H2O} \)C. \( \ce{Fe + Br2 -> FeBr2} \)D. \( \ce{2KI + Cl2 -> 2KCl + I2} \)