Practice Paper 6 (F/M22/20)

Which statements about the electrolysis of molten lead(II) bromide are correct?

• Lead ions move to the anode and are oxidised.

• Lead ions move to the cathode and are reduced.

• Bromide ions move to the anode and are oxidised.

• Bromide ions move to the cathode and are reduced.

Aqueous copper(II) sulfate is electrolysed using carbon electrodes. Which statement is correct?

• Bubbles of hydrogen are formed at the anode.

• Bubbles of oxygen gas are formed at the cathode.

• Copper is deposited at the anode.

• The blue colour of the solution fades.

Which statements about hydrogen fuel cells are correct?

• The reaction between hydrogen and oxygen is endothermic.

• The waste product in a hydrogen fuel cell is water.

• A chemical reaction in the cell produces hydrogen which is used as the fuel.

• A hydrogen fuel cell is used to generate electricity.

Four different acids are dissolved in water. Which beaker contains the most concentrated strong acid solution?

• A

• B

• C

• D

Which statements about propene are correct?

• Propene contains only single bonds.

• Propene decolourises bromine water.

• Propene is obtained by cracking.

• Propene is a hydrocarbon.

Which row describes the production of ethanol and its properties?

• A

• B

• C

• D

The structure of a polymer is shown. Which statements about the polymer are correct?

• The polymer is nylon.

• The polymer is formed by condensation polymerisation.

• There are ester linkages between the monomers.

Petroleum is an important raw material that is separated into useful products. Which terms describe petroleum and the method used to separate it?

• compound, cracking

• compound, fractional distillation

• mixture, cracking

• mixture, fractional distillation

Solid X has a high boiling point. Its structure has positive ions surrounded by a sea of electrons. Which other properties does solid X have?

• brittle and an electrical conductor

• brittle and an insulator

• malleable and an electrical conductor

• malleable and an insulator

Which statement about the Periodic Table is correct?

• Most metallic elements are on the left.

• Elements in the same period have the same number of outer electrons.

• Elements on the left are usually gases.

• The relative atomic mass of the elements increases from right to left.