Higher Chemistry Redox

Which of the following is the strongest reducing agent:

• fluorine

• lithium

• calcium

• iodine

• A

• B

• C

• D

An oxidising agent

• gains electrons and is oxidised

• loses electrons and is oxidised

• gains electrons and is reduced

• loses electrons and is reduced.

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

When a gas changes iron(III) oxide to iron(II) oxide, the gas is

• a combustible gas

• a reducing agent

• an inert gas

• an oxidising agent

What is the reducing agent of this reaction?

2Al (s) + 6H⁺ (aq) → 2Al³⁺ (aq) + 3H₂ (g)

• H⁺

• Al³⁺

• Al

• H₂