Cambridge & Pearson Edexcel Past Paper Questions

Element X can be represented by the symbol ¹⁴₆X. Which statements about an atom of element X are correct? 1 It has 6 electrons. 2 It has 8 protons....

Which row is correct?

A molecule of tetrafluorosilane, SiF₄, is shown in the dot-and-cross diagram. Only the outer shell electrons are shown. Which statement is correct?

The table describes two properties associated with metals. Which row shows a correct reason for the stated property?

Aqueous silver nitrate, AgNO₃, reacts with aqueous potassium chromate(VI), K₂CrO₄, to give a yellow precipitate. What is the ionic equation for thi...

What is the relative formula mass of anhydrous sodium carbonate?

What contains the greatest mass of solute?

How many tonnes of aluminium oxide, Al₂O₃, are required to produce 27 tonnes of aluminium?

Dilute sulfuric acid is electrolysed. Hydrogen gas and oxygen gas are produced. Which row correctly describes what happens?

Aluminium can be extracted by the electrolysis of aluminium oxide dissolved in molten cryolite. Which reactions take place during the electrolysis?

Which reaction is exothermic?

What is the correct balanced equation and enthalpy change, ∆H, for the complete combustion of butanol, C₄H₉OH?

Bromate, bromide and hydrogen ions react according to the equation shown. BrO₃⁻(aq) + 5Br⁻(aq) + 6H⁺(aq) → 3Br₂(aq) + 3H₂O(l) Some apparatus for me...

25 cm³ of 1.0 mol/dm³ hydrochloric acid reacts with 10 g of a solid to produce a gas. The solid is in excess. The graph labelled first experiment s...

Nitrogen dioxide, NO₂, is a dark brown gas that decomposes as shown in the equation. 2NO₂(g) ⇌ 2NO(g) + O₂(g) dark brown colourless The diagram sho...

What is an observation of an oxidation process?

An excess of aqueous iodide ions is added to acidified aqueous potassium manganate(VII). Which row is correct?

When ammonia gas is dissolved in water a reversible reaction takes place. NH₃(g) + H₂O(l) ⇌ NH₄⁺(aq) + OH⁻(aq) Which statements are correct? 1 Ammo...

Three dilute solutions of acid, each with a concentration of 0.01 mol/dm³, are reacted separately with excess calcium carbonate until there is no f...

The steps for the preparation of a pure sample of sodium nitrate are listed. 1 Titrate with dilute nitric acid until the end-point is seen. 2 Evapo...

A white compound is insoluble in water. Which cations and anions could be present in the compound?

The flow chart describes the preparation of ammonium sulfate. What are elements 1–4?

Which row correctly shows the possible uses of sulfur dioxide and sulfuric acid?

Selenium is in Group VI and gallium is in Group III. Which prediction can be made from this information?

Which statement about some metals and their compounds is correct?

The diagram shows an experiment to determine the percentage of oxygen in air. Which diagram shows the correct level of water after the candle stops...

The addition reaction between a hydrocarbon X and bromine forms only one product. Which compound is X?

A series of reactions producing propanol from the naphtha fraction of petroleum (crude oil) is shown. What are processes X and Y?

The structures of four alcohols are shown. Which statement is correct?

Which compounds have the molecular formula C₃H₆O₂? 1 methyl ethanoate 2 ethyl methanoate 3 propanoic acid

An organic compound has the empirical formula CH₂O. Which row shows a possible correct name and structure for this compound?

The repeat unit of a polymer is shown.-] Which monomer would produce this polymer?

Choose from the following compounds to answer the questions. NH4Cl BaSO4 KI K2SO3 Mg(NO3)2 NaOCOCH3 Na2CO3 Na3PO4 ZnSO4 Each compound may be used o...

The table shows some information about elements in Group V. | element | electronic configuration | melting point /°C | boiling point /°C | |:------...

The diagram shows some reactions of butanol. [Figure showing butanol structure and reaction pathways for complete combustion, incomplete combustion...

The table shows information about some particles. | particle | proton number | nucleon number | |:---------|:--------------|:---------------| | 35C...

Iron reacts with steam and with dilute sulfuric acid.

Carbon monoxide and nitrogen monoxide are pollutants formed in a car engine.

Aluminium is an element in Group III of the Periodic Table.

Alkenes are a homologous series of unsaturated hydrocarbons.

Ammonia, NH3, is used to make nitrogenous fertilisers.

Choose from the following compounds to answer the questions. AgCl Ba(NO3)2 KI KMnO4 K2SO3 Mg(NO3)2 Na2CO3 Na3N NH4CL ZnSO4 Each compound may be use...

The table shows some information about elements in Group VI. | element | electronic configuration | melting point /°C | density in g/cm³ | |---|--...

The diagram shows some reactions of butanoic acid. [Figure 3.1: Diagram showing butanoic acid (structure H H H O / H-C-C-C-C-O-H / H H H) reacting ...

The table shows information about some particles. | particle | number of protons | neutrons | electrons | |---|---|---|---| | 79Br 35 | 35 | 44 | ...

Ethanol is manufactured by the reaction between ethene and steam. The conditions used are 300°C, a high pressure and a phosphoric acid catalyst. (a...

A sample of an alloy containing aluminium and copper is added to hot dilute sulfuric acid. Only the aluminium reacts with the dilute sulfuric acid....

Carbon dioxide and sulfur dioxide are pollutants formed at power stations that burn fossil fuels such as coal.

Zinc is a metal. Coating iron with zinc prevents iron from rusting. Explain how a coating of zinc prevents iron from rusting when the coating is sc...

Alkanes are a homologous series of saturated hydrocarbons.