Electricity and Chemistry

Which of the following is a conductor?

• Plastic

• Iron

• Wood

• Ceramin

Which of the following are insulators? Select two correct answers.

• Oil

• Rubber

• Tin

• Aluminium

What is an electrolyte?

• A liquid that contains ions, and therefore conducts electricity.

• A liquid that does not contains ions, and therefore does not conduct electricity.

• A liquid that contains electrons, and therefore conducts electricity.

• A liquid that does not contains electrons, and therefore does not conduct electricity.

State True or false.

Electrolysis is a redox reaction. Reduction takes place at the cathode and oxidation at the anode.

• True

• False

Which ions are present in a molten solution of NaCl? Select the two correct answers.

Which ions are present in a molten solution of Aluminium oxide? Select the two correct answers.

• This is an oxidation reaction.

• This is a reduction reaction.

• This is a redox reaction.

• 

The half-equations for an electrolysis process are shown.

What is the net ionic equation?

• 2

• 4

• 6

• 8

The diagram shows the set-up of the apparatus used to electroplate an iron key with silver. What is observed at the anode and cathode after 30 minutes?

• Silver foil becomes thinner at cathode.

• Silver foil becomes thinner at anode.

• Shiny grey deposits are formed at anode.

• Shiny grey deposits are formed at cathode.