REDOX EQUILIBRIUM (1.1)

Tick the correct answer.

Fe → Fe²⁺ + 2e^-

• Oxidation

• Reduction

Tick the correct answer

4OH^- → 2H₂O + O₂ + 4e^-

• Reduction

• Oxidation

Which substance undergoes reduction?

2Fe²⁺(aq) + Cl₂ (aq) →2Fe³⁺(s) +2Cl^- (aq)

• Fe²⁺

• Cl₂

Which substance is the reducing agent?

2Fe²⁺(aq) + Cl₂ (aq) →2Fe³⁺(s) +2Cl^- (aq)

• Fe²⁺

• Cl₂

The equation below shows the reaction between sodium and water to form sodium hydroxide and hydrogen.

2Na + 2H₂O →2NaOH +H₂

In this reaction, Na undergoes _______________ and H₂O undergoes _____________

• Na - oxidation

• H₂O - reduction

• Na - reduction

• H₂O - oxidation

State the oxidising agent from the given ionic equation

Cu (s) + 2Ag⁺ (aq)→ Cu ²⁺ (aq) + 2Ag (s)

• Cu

• Ag⁺

• Cu ²⁺

• Ag

Which of the following represents an oxidizing agent?

• Zinc

• Bromine water

• Potassium iodide solution

• Acidified potassium manganate(VII) solution

Refer to the following reaction

2I^- (aq) + 2Fe³⁺ (aq) →2Fe²⁺ (aq) + I₂ (aq)

Which of the following statements about the ionic equation is true?

• Fe³⁺ is oxidised

• Fe³⁺ is a reducing agent

• I^- is a reducing agent

• I^- donates electron to Fe³⁺