Cambridge & Pearson Edexcel Past Paper Questions

Two large molecules, P and Q, both contain the same linkage. P occurs naturally but Q does not. Which row could be P and Q?

The electronic configurations of five atoms are shown. [Figure A, B, C, D, E showing electronic configurations]

Zinc reacts with aqueous nickel(II) nitrate. Zn(s) + Ni(NO3)2(aq) → Zn(NO3)2(aq) + Ni(s)

Tartaric acid and succinic acid are colourless organic acids. The structures of these acids are shown. [Figure showing structures of tartaric acid ...

The alkanes are a homologous series of saturated hydrocarbons.

The Periodic Table is an arrangement of elements in groups and periods.

Some properties of the Group V elements are shown. [Table: element, electrical conductivity of solid, melting point /°C, boiling point /°C for nitr...

The products of respiration are carbon dioxide and water.

Chromium is a transition element. Sodium is an element in Group I of the Periodic Table.

Cerium is a metal with a relative atomic mass of 140. Cerium powder reacts with sulfuric acid. 2Ce(s) + 3H2SO4(aq) → Ce2(SO4)3(aq) + 3H2(g)

The electronic configurations of five atoms are shown. A: An atom with 3 electron shells, containing 2 electrons in the first shell, 8 in the secon...

Magnesium reacts with aqueous copper(II) sulfate. Mg(s) + CuSO₄(aq) → MgSO₄(aq) + Cu(s)

The structure of fumaric acid is shown. [Figure 3.1: A molecule showing two carboxylic acid groups connected by a carbon-carbon double bond: HO-C(=...

The alkenes are a homologous series of unsaturated hydrocarbons.

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 ...