Ss2 Tech quiz final round

Select the cheapest method of obtaining oxygen

• Collecting steam of ocean water

• Fractional distillation of liquid air

• Electrolysis of fused sodium chloride

• Bosch process

What name is given to the positive electrode

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

What would be the product at the positive electrode in the electrolysis of Silver Nitrate solution

• Silver

• Nitrogen

• Hydrogen

• Oxygen

What particles carry the electrical charge through the electrolyte

• Electrons

• Ions

• Atoms

• Molecules

What would be the product at the positive electrode in the electrolysis of Sodium Chloride solution

• Sodium

• Chlorine

• Hydrogen

• Oxygen

What is the name given to the negative electrode

What particle carries the charge in the wire?

• electron

• proton

• ion

• atom

The diagram shows apparatus for plating a spoon with silver.

Which statement is not correct?

• Silver would stick to the spoon because it is a very reactive metal.

• The electrolyte would be a silver salt dissolved in water.

• The metal electrode would be made from silver..

• The spoon would be connected to the negative terminal of the power supply.

What particles carry the electrical charge through the electrolyte

• Electrons

• Ions

• Atoms

• Molecules