IGCSE - C4. Electrochemistry

What does electrolysis mean?

• Breaking down compounds into their elements using electricity

• Combining elements to make compounds using electricity

• Breaking down compounds into their elements to generate electricity

• Combining elements to make compounds and generate electricity

What is the name of a positively charged ion?

• positron
• proton
• cation
• anion

What is the name of a negatively charged ion?

• negatron
• electron
• cation
• anion

What is the name of a negatively charged electrode?

• cathode
• anode
• cation
• anion

What is the name of a positively charged electrode?

• cathode
• anode
• cation
• anion

What state must the ionic compound be in to be electrolysed?

• aqueous only
• solid only
• solid or aqueous only
• molten or aqueous only

What particle carries the charge in the wire?

• electron
• proton
• ion
• atom

What particle carries the charge in the electrolyte?

• electron
• proton
• ion
• atom

Which statement correctly describes the 2 electrodes?

• The anode is negative and the cathode is positive
• The anode and cathode are both positive
• The anode is positive and the cathode is negative
• The anode and cathode are both negative.

Explain why the electrolyte has to be a liquid.

• So the ions can move
• So the electrons can move
• So that it doesn't get too hot
• So the fish are ok