Class 11 - Redox Reactions - Quiz 1

Which of the following represents a redox reaction?

• NaOH + HCl → NaCl + H₂O

• BaCl₂ + H₂SO₄ → BaSO₄ + 2HCl

• CuSO₄ + 2H₂O → Cu(OH)₂ + H₂SO₃

• Zn + 2HCl → ZnCl₂ + H₂

Which reaction involves neither oxidation nor reduction?

• CrO₄^2- -→ Cr₂O₇^2-

• Cr → CrCl₃

• Na → Na⁺

• 2S₂O₃^2- → S₄O₆^2-

While representing the redox couple, ____form is put before the ____` form.

• neutral, ionic

• ionic, non-ionic

• reduced, oxidised

• oxidised, reduced

The reduction reaction in the process Co(s) + Ni²⁺(aq) → Co²⁺(aq) + Ni(s) is ____.

• Ni²⁺(aq) + 2e^- → Ni(s)

• Ni²⁺(aq) + e^- → Ni(s)

• Co(s) → Co²⁺(aq) + 2e^-

• Co(s) → Co²⁺(aq) + e^-

Which of the following reaction involves oxidation and reduction?

• H₂ + Br₂ → 2HBr

• NaBr + HCl → NaCl + HBr

• HBr + AgNO₃ → AgBr + HNO₃

• 2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O