Oxidising and Reducing agents

In redox reactions, what happens to the reducing agent?

• It is oxidised

• It does not participate in the reaction and remains unchanged

• It is reduced

In redox reactions, what happens to the oxidising agent?

• It is oxidised

• It does not participate in the reaction and remains unchanged

• It is reduced

Which statement is true of a reducing agent?

• It is oxidised as it gains electrons.

• It is oxidised as it loses electrons.

• It is reduced as it gains electrons.

• It is reduced as it loses electrons.

What is the substance that loses hydrogen in a redox reaction?

• oxidizing agent

• reducing agent

• is reduced

• decreases in oxidation number

What is the substance that loses oxygen in a redox reaction?

• oxidizing agent

• reducing agent

• is oxidized

• increases in oxidation number

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

• a reducing agent

• an oxidising agent

For the following example, identify the reducing agent:

H₂ + Cl₂ --> 2HCl

• H₂

• Cl₂

• Both

Acidified potassium manganate(VII) solution is an oxidising agent used to test for a reducing agent.

• True

• False

An aqueous solution of potassium iodide turns from colourless to brown. What happens to the iodide ions?

• Iodide ions are oxidised due to gain of electrons.

• Iodide ions are oxidised due to loss of electrons.

• Iodide ions are reduced due to gain of electrons.

• Iodide ions are reduced due to loss of electrons.

Aqueous potassium iodide is a reducing agent and can be used as a test for an oxidising agent.

• True

• False