Cambridge & Pearson Edexcel Past Paper Questions

A farmer spread ammonium nitrate, a nitrogenous fertiliser, on a field. The next day he spread calcium hydroxide on the same field. This caused a l...

Which row correctly compares carbon dioxide and methane? both contain carbon both are described as a greenhouse gas both lower the pH of water whe...

Fossil fuels are used to power some internal combustion engines. Which pollutants are produced by an internal combustion engine burning fossil fue...

An ester is produced by reacting together the carboxylic acid HCO2H and the alcohol CH3CH2CH2OH. What is the name and structure of this ester? na...

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

Each of compounds W, X, Y and Z is either an unbranched alkane or an unbranched alkene. W C9H18 X C9H20 Y C10H20 Z C10H22 Which two compounds und...

One mole of each alkane undergoes complete combustion. Which alkane will produce seven moles of products?

Which statement about macromolecules is correct?

An organic compound, X, has a molecular formula C4H8O2 and turns damp, blue litmus paper red. What is the structure of X?

Which polymer contains only three different elements?

The diagram shows four pieces of apparatus that are used to measure the volume of a gas or liquid. Which piece of apparatus should always be filled...

The diagrams show the structures of two forms of carbon. Which of X and Y conduct electricity?

An aqueous solution of zinc chloride is tested by adding reagents. Which observation is correct?

Which statement about the particles ₁₉F⁻, ²⁰Ne and ²³Na⁺ is correct?

The table shows some properties of four substances. Which substance is an ionic compound?

Four samples are spotted onto chromatography paper. It is known that one of these samples is pure compound Q. A separate sample of pure compound Q ...

How many of the molecules shown contain only one covalent bond? Cl₂ H₂ HCI N₂ O₂

Which statements about sulfur and its compounds are correct? 1 Sulfur is in Group VI of the Periodic Table and has six outer shell electrons. 2 In ...

50.0 cm³ of 0.10 mol/dm³ silver nitrate, AgNO₃, is added to 150.0 cm³ of 0.05 mol/dm³ sodium chloride, NaCl, in a beaker. As well as solid silver c...

Nitrogen monoxide and oxygen react to form nitrogen dioxide. 2NO(g) + O₂(g) → 2NO₂(g) What is the maximum volume of nitrogen dioxide that could be ...

Dilute sulfuric acid is electrolysed between inert electrodes. Which statements are correct? 1 Hydrogen is released at the negative electrode. 2 Ox...

Caesium, Cs, is in the same group of the Periodic Table as sodium. Which products are obtained from the electrolysis of concentrated aqueous caesiu...

The diagrams show the apparatus for the electrolysis of aqueous copper(II) sulfate. In experiment X both electrodes are inert. In experiment Y both...

The energy profile diagram for the forward direction of a reversible reaction is shown. For the reverse reaction, which row correctly shows the sig...

The formation of liquid water from hydrogen and oxygen may occur in three stages. 1 2H₂(g) + O₂(g) → 4H(g) + 2O(g) 2 4H(g) + 2O(g) → 2H₂O(g) 3 2H₂O...

In four separate experiments, 1, 2, 3 and 4, nitric acid was added to excess marble chips and the volume of carbon dioxide formed was measured. In ...

The equation shows the formation of sulfur trioxide in the contact process. 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) ΔH = –196 kJ/mol What would decrease the yiel...

Zinc reacts with dilute sulfuric acid. Zn + H₂SO₄ → ZnSO₄ + H₂ From this equation, what can be deduced about the reaction?

Consider the three reactions. 1 reaction between ammonium chloride and calcium hydroxide 2 ethane burning in air 3 reaction between ethanoic acid a...

Which statement about weak acids is correct?

Which gas dissolves in water to give a solution with a pH greater than 7?

Element X forms an oxide of formula X₂O₅. In which group of the Periodic Table is X likely to be found?

Element M is a typical transition metal. Which property will it not have?

An atom of element E forms a white oxide of formula EO. What is E?

The table shows the proton numbers of four elements. Which statement is correct?

The results of experiments involving four metals, W, X, Y and Z, and their ions are shown. Y(s) + Z⁺(aq) → Y⁺(aq) + Z(s) W(s) + X⁺(aq) → no reactio...

Metals have a structure of positive ions in a 'sea of electrons'. Metals are malleable because it is possible to force the ions to slide over each ...

Which two substances are removed from the bottom of a blast furnace? 1 coke 2 iron 3 limestone 4 slag

Aluminium is used in the manufacture of aeroplanes. What is a property of aluminium and is also a reason for this use?

How can the reaction between nitrogen and hydrogen be described?

Bottled fruit juice may have small amounts of sulfur dioxide added. What is the purpose of this?

Dissolved substances in water can cause eutrophication. How many of the ions shown cause this effect? Cl⁻ CO₃²⁻ Na⁺ NO₃⁻ PO₄³⁻

Which list contains only gases that are always present in unpolluted air?

One mole of each alkane undergoes complete combustion. Which alkane will produce seven moles of products?

Ethanoic acid is formed when ethanol is reacted with acidified potassium manganate(VII). What is the name of this process?

The structure of compound X is shown. CH₃–CH₂–CH₂–CH₂–OH Which statement is not correct?

After which conversion does the product contain more carbon atoms than the reactant?

Molecules 1–4 are unbranched hydrocarbons. 1 C₁₀H₂₂ 2 C₁₀H₂₀ 3 C₉H₂₀ 4 C₈H₁₆ Which row correctly identifies these hydrocarbons as alkanes or alkenes?

Choose from the following oxides to answer the questions. calcium oxide carbon dioxide copper(II) oxide silicon dioxide sodium oxide sulfur dioxide...

(a) Atoms and ions contain three types of sub-atomic particle. Complete the table about these sub-atomic particles. sub-atomic particle | relative ...