Electrochemistry

The process of splitting a compound by passing electric current through it is called:

• 1 Filtration
• 2 Combustion
• 3 Electrolysis
• 4 Distillation

In electrolysis, the electrode connected to the negative terminal of the battery is the:

• 1 Salt bridge
• 2 Anode
• 3 Cathode
• 4 Electrolyte

Oxidation is the:

• 1 Loss of neutrons
• 2 Gain of electrons
• 3 Loss of electrons
• 4 Gain of protons

What is collected at the cathode when molten sodium chloride is electrolysed?

• 1 Hydrogen
• 2 Sodium
• 3 Chlorine
• 4 Oxygen

Electroplating is used to:

• 1 Cool a metal
• 2 Make water pure
• 3 Make alloys
• 4 Coat one metal with a thin layer of another

The oxidation number of oxygen in most compounds is:

• 1 -2
• 2 +1
• 3 +2
• 4 0

In the electrolysis of water, the gas collected at the cathode is:

• 1 Oxygen
• 2 Chlorine
• 3 Nitrogen
• 4 Hydrogen

A substance that conducts electricity when molten or dissolved is an:

• 1 Catalyst
• 2 Non electrolyte
• 3 Insulator
• 4 Electrolyte

Which is a non electrolyte?

• 1 Salt solution
• 2 Sugar solution
• 3 Dilute acid
• 4 Molten salt

Anode is the electrode where ___ occurs.

• 1 Evaporation
• 2 Oxidation
• 3 Reduction
• 4 Neutralisation