electrolysis

What does the Nucleus of an atom contain?

• Protons

• Electrons

• Neutrons

What does the Nucleus of an atom contain?

• Protons

• Electrons

• Neutrons

What happens at the positive electrode?

• Positive non-metal ions are attracted
• Positive metal ions are attracted
• Negative non-metal ions are attracted
• Negative metal ions are attracted

The diagram shows the electrolysis of lead(II) bromide using inert electrodes. Why does the bulb only light up when the lead(II) bromide is melted?

• Bromine atoms in lead(II) bromide are converted to ions when it is melted

• Electrons flow through the lead(II) bromide when it is melted

• The ions in lead(II) bromide are mobile charge carriers in the molten state.

• There are no ions in solid lead(II) bromide

Aqueous NaCl was electrolysed using inert electrodes. Which half-equation took place at the anode?

What is the product formed at the cathode and anode during the electrolysis of concentrated copper(II) chloride using graphite electrodes?

• cathode: copper; anode: oxygen

• cathode: hydrogen; anode: chlorine

• cathode: copper; anode: chlorine

• cathode: hydrogen; anode: oxygen

Name gas A

• hydrogen
• chlorine
• water
• sodium hydroxide

charge of lithium ion

• -2
• -1
• +1
• +2

What charge will an Oxygen ion have? 

• +1
• -1
• +2
• -2

Where are metals located on the periodic table?

• Blue
• Green
• Red