Cambridge & Pearson Edexcel Past Paper Questions

Some properties of Group VI elements are shown. [Figure 6.1: Table showing density at room temperature (in g/cm³), melting point (°C), boiling poin...

Plants remove carbon dioxide from the air during photosynthesis.

Bismuth is a metallic element in Group V of the Periodic Table.

Sulfuric acid reacts with zinc to form zinc sulfate and hydrogen. Zn(s) + H₂SO₄(aq) → ZnSO₄(aq) + H₂(g)

Which process is involved in all of the following? 1 obtaining copper(II) sulfate crystals from aqueous copper(II) sulfate 2 obtaining ethanol from...

In which reaction is a white precipitate present when the reaction is complete?

Which three elements exist as diatomic molecules at room temperature?

Sulfur dioxide is a gas that is prepared by heating sodium sulfite with hydrochloric acid. It is an acidic gas. Sulfur dioxide is more dense than a...

Hydrogen sulfide burns in an excess of oxygen according to the equation shown. 2H₂S(g) + 3O₂(g) → 2H₂O(g) + 2SO₂(g) 48 dm³ of hydrogen sulfide is b...

Which row correctly identifies the different formulae of ethene and of its homologous series? CH₂ C₂H₄ CnH₂n

What is the ratio of the number of molecules in 71g of gaseous chlorine to the number of molecules in 2 g of gaseous hydrogen?

The diagram shows an electrolysis experiment using inert electrodes. Which row shows what happens to the concentration of the electrolyte in L and ...

Molten sodium chloride is electrolysed. Which equation correctly shows the reaction that occurs at the cathode?

An energy profile diagram is shown. What does the arrow R on the diagram represent?

Which statement about exothermic and endothermic reactions is correct?

Gas P decomposes to form gas Q. xP → yQ Two experiments are carried out to investigate the rate of reaction. The conditions are the same except tha...

In which reaction is the underlined substance reduced?

The equation for an industrial process is shown. C(s) + H₂O(g) → CO(g) + H₂(g) ΔΗ = +131 kJ/mol Which row is correct?

Sodium hydroxide is added to a solution to alter its pH. A neutral solution is formed. Which statement is correct?

Sodium chloride is dissolved in distilled water. Universal indicator is added to the solution. What is the colour of the universal indicator?

Which statement about ammonia is correct?

Which statement gives reasons why ammonium sulfate can be used as a fertiliser?

Sulfuric acid is manufactured using the contact process. The equations for the reactions in the process are shown. reaction 1 2SO₂(g) + O₂(g) ⇌ 2SO...

Three statements about the elements carbon, nitrogen and sulfur are shown. 1 They are in groups next to each other in the Periodic Table. 2 Their n...

What is a property of halogens?

Part of the Periodic Table shows the positions of four elements. These are not the elements' actual symbols. Which element has a high melting point...

Brass is made from copper and zinc. It has many uses. Brass is ......1....... of these two elements. Brass is used in electrical plugs because it i...

Metal carbonates decompose when heated. Which carbonate is most stable to heat?

Tin is a metal between iron and lead in the reactivity series. Which method is used for the extraction of tin from its ores?

Aluminium is extracted from aluminium oxide by electrolysis. Which statement about this electrolysis is correct?

Methane and sulfur dioxide are two air pollutants found in the Earth's atmosphere. Which row correctly identifies one source of each gas?

The water supply can be purified by filtration and chlorination. Which substance remains in the water supply after these treatments?

Which statements are true for homologous series? 1 Each series contains saturated compounds. 2 The compounds in each series are unreactive. 3 Each ...

How many structural isomers with the formula C₄H₁₀O are alcohols?

Which statements about the alcohol CH₃CH₂CH₂OH are correct? 1 When CH₃CH₂CH₂OH is oxidised, it forms propanoic acid. 2 CH₃CH₂CH₂OH burns in the air...

Propanoic acid reacts with calcium carbonate. The products of this reaction are calcium propanoate, carbon dioxide and water. What is the equation ...

An acid reacts with an alcohol to form an ester and water. CH₃CH₂COOH + CH₃CH₂OH → CH₃CH₂C(=O)O-CH₂CH₃ + H₂O What is the name of the ester formed i...

Part of a polymer chain is shown. Which monomer was used to produce this polymer?

The diagrams show three stages, 1, 2 and 3, used in the preparation of a salt. Which row correctly shows the solubilities both of the reactants and...

The nucleon number of an atom is typically greater than its proton number. The difference between these two numbers indicates the number of .....1....

Which is a pure compound?

Which diagram best represents the structure of a solid metal?

Hydrogen sulfide burns in an excess of oxygen according to the equation shown. 2H2S(g) + 3O2(g) → 2H2O(g) + 2SO2(g) 48 dm³ of hydrogen sulfide is b...

Which statement about electrical conductivity is correct?

Ammonia is manufactured from nitrogen and hydrogen by the Haber process. N2(g) + 3H2(g) ⇌ 2NH3(g) What is the percentage yield when 60 kg of ammoni...

The diagram shows the apparatus for an electrolysis experiment. Using the apparatus shown, which electrolyte would give colourless gases at both el...

Which metal is most likely to be extracted from its molten chloride by the use of electrolysis?

Two energy profile diagrams are shown. The scale on the y-axis is the same for both diagrams. Which statement is correct?

Ammonium nitrate dissolves in water. NH4NO3(s) H2O → NH4NO3(aq) ΔH = +25 kJ/mol Which statements are correct? 1 The reaction is endothermic. 2 The ...

Which statement about photosynthesis is correct?