Redox equilibrium

Tick the correct answer.

Fe → Fe²⁺ + 2e^-

• Oxidation

• Reduction

Tick the correct answer

4OH^- → 2H₂O + O₂ + 4e^-

• Reduction

• Oxidation

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

Which of the following represents an oxidizing agent?

• Zinc

• Bromine water

• Potassium iodide solution

• Acidified potassium manganate(VII) solution

What is the name for SiCl_4?

• Silicon tetrachloride
• Silicon (IV) chloride
• Silicon (IV) tetrachloride
• Tetrasilicon monochloride

Which of the following is the balanced half -reaction for the oxidation of Cu to Cu^+2?

• Cu   --> Cu^+2
• Cu + 2 e-   --> Cu^+2
• Cu  --> Cu^+2  + 2 e-
• Cu - 2e-  --> Cu^+2

What is oxidation number of Cr in Cr₂O_7^2-?

• -2
• +2
• +6
• +12

     In the reaction Zn + H₂O --> ZnO₂ + H₂
 which element, if any, is oxidized? 

• Zinc
• Hydrogen
• Oxygen
• None

Choose all the statements which are correct for an oxidising agent.

• removes hydrogen

• gains oxygen

• is reduced at the end of the reaction

• accepts electrons