NEET Chemistry: Redox Reactions — Practice Set 8

Q1. Which of the following is a redox reaction involving combination?

Q2. Which reaction involves a displacement redox process?

Q3. In \( \ce{2MnO2 + 4NaOH + O2 -> 2Na2MnO4 + 2H2O} \), what is the total number of electrons transferred per mole of \( \ce{MnO2} \)?

Q4. In the reaction \( \ce{2K + O2 -> K2O2} \), what is the oxidizing agent?

Q5. In \( \ce{2K2Cr2O7 + 2H2O + 3S -> 4KOH + 2Cr2O3 + 3SO2} \), which element undergoes the largest decrease in oxidation number?

Q6. Which reaction demonstrates oxidation by the addition of oxygen to a non-metal without hydrogen involvement?

Q7. What is the oxidation number of manganese in \( \ce{MnO2} \)?

Q8. In the reaction \( \ce{2H2S + 3O2 -> 2SO2 + 2H2O} \), how many electrons are transferred per molecule of \( \ce{H2S} \)?

Q9. In the reaction \( \ce{Mg + 2HCl -> MgCl2 + H2} \), what is the reducing agent?

Q10. In the reaction \( \ce{3Cl2 + 6NaOH -> 5NaCl + NaClO3 + 3H2O} \), which species acts as the reducing agent?

Chemistry — Redox Reactions

Set 8 of 20

15:00

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Which of the following is a redox reaction involving combination?