Electrolysis Lesson Review Quiz

Oxidation can be defined as a

• gain of electrons

• loss of electrons

Ionic compounds do not conduct electricity when they are solid because,

• their electrons are not free to move

• their ions are free to move

• their ions are not free to move

• their electrons are free to move

Conduction of electricity depends on presence of

• mobile ions only

• mobile electrons only

• mobile ions or protons

• mobile ions or electrons

Which of these equations show the oxidation half equation of magnesium metal to its ion?

• Mg + 2e --> Mg²⁺

• Mg --> Mg²⁺ + 2e

• Mg²⁺ + 2e --> Mg

• Mg²⁺ --> Mg + 2e

Which of these show the reduction half equation of chlorine atom to its ion?

• 2Cl^- + 2e --> Cl₂

• 2Cl^- --> Cl₂ + 2e

• Cl₂ + 2e --> 2Cl^-

• Cl₂ --> 2Cl^- + 2e

The cathode is

• the positive terminal and it attracts anions

• the positive terminal and it attracts cations

• the negative terminal and it attracts anions

• the negative terminal and it attracts cations

The anode is

• the positive terminal and it attracts anions

• the positive terminal and it attracts cations

• the negative terminal and it attracts anions

• the negative terminal and it attracts cations

At the anode.

• oxidation occurs and ions lose electrons

• oxidation occurs and ions gain electrons

• reduction occurs and ions lose electrons

• reduction occurs and ions gain electrons

At the cathode,

• oxidation occurs and ions lose electrons

• oxidation occurs and ions gain electrons

• reduction occurs and ions lose electrons

• reduction occurs and ions gain electrons

Which of the substances below CANNOT be used as an electrolyte?

• aqueous sodium chloride

• molten sodium chloride

• solid sodium chloride

• concentrated sodium chloride solution