Cambridge & Pearson Edexcel Past Paper Questions

Hydrogen and nitrogen react to form ammonia. N2 + 3H2 ⇌ 2NH3 Which statement is correct?

Which statement about the hydrocarbon C2H4 is not correct?

The diagram shows the fractional distillation of an aqueous solution of ethanol. [Figure 1.1] Which statement explains why ethanol is collected as ...

Which statements are correct? 1 The volume of a gas at constant pressure increases as the temperature increases. 2 The rate of diffusion of a gas i...

A colourless solution is known to contain a sodium salt. Tests were carried out to determine the identity of the anion in the solution. [Table show...

Which physical changes are both exothermic?

The following data may refer to the atom or to the ion of the same element. • electronic configuration 2,8,8 • nucleon number 40 • proton number 20...

A molecule of sulfuric acid has the structural formula shown. [Structural formula of sulfuric acid (H₂SO₄)] How many electrons are involved in form...

A metal consists of a lattice of positive ions in a 'sea of electrons'. What happens to the electrons and positive ions in a metal wire when an ele...

The apparatus shown is set up to plate a steel key with copper. [Figure 9.1] The key does not get coated with copper. Which change needs to be made...

What is the number of moles of hydrogen atoms in 3.2 g of methane?

The formula of the gas ozone is O₃. What is the volume of 48 g of ozone at r.t.p.?

Which substance, when added to pure water, will produce a solution which conducts electricity?

Two gases, X and Y, react together to form a gas Z, as shown. X(g) + 3Y(g) ⇌ 2Z(g) ΔH = −92 kJ/mol Which change in condition will both increase the...

A solution of sodium carbonate was added to tap water. A white precipitate formed. Which ion present in the tap water caused the precipitate to form?

Iron is obtained in the blast furnace from the ore haematite. Which reaction takes place in the blast furnace?

Aluminium is manufactured from aluminium oxide by electrolysis. The compound cryolite is used in this process. Which statement about cryolite is co...

Which statement about the Periodic Table is correct?

The reaction shown for the Haber process can reach equilibrium. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) Which row shows the gases present at equilibrium? [Table s...

The energy profile diagram for a reaction is shown. [Figure 25.1] Which statement is correct?

The Periodic Table shows the positions of elements A, B, C and D. These are not the usual symbols of these elements. [Partial Periodic Table diagra...

Which of the statements about iron and steel is not correct?

Some reactions are shown. 1 2SO₂ + O₂ → 2SO₃ 2 C₃H₆ + H₂ → C₃H₈ 3 C₂H₄ + H₂O → C₂H₅OH Which of these reactions use a catalyst when carried out indu...

Which two elements are the major constituents of brass?

Two statements about copper are given. 1 Copper is below hydrogen in the reactivity series. 2 Copper can be obtained by heating its oxide with carb...

What is the order of reactivity of the halogens? [Table showing relative reactivities of halogens]

The flow chart shows how impure water can be treated to produce drinkable water. [Flow chart for water treatment] What is not removed from the wate...

Which diagram shows the isomer of butane?

The diagram shows the structure of a monomer used to make a polymer. [Structure of monomer (2-methylprop-1-ene)] What is the structure of the polymer?

The structures of three hydrocarbons from the same homologous series are shown. [Structural diagrams W, X, Y] Which statement is correct?

How many of the following statements about ethanol are correct? 1 molecular formula is C₂H₆O 2 manufactured from ethane and steam 3 oxidises to eth...

Proteins and nylon both possess the same amide linkages. Which arrangement of atoms represents an amide linkage?

A carbohydrate such as starch can be represented as shown. [Diagram of repeating unit X in a polymer chain] What is X?

Choose from the following gases to answer the questions below. ammonia argon carbon dioxide chlorine ethane ethene nitrogen nitrogen(II) oxide oxyg...

Coal is a mixture of carbon compounds with a small amount of sulfur. A sample of coal is heated in the absence of air using the apparatus shown. [F...

A layer of ozone is present in the stratosphere about 30 km above the Earth's surface.

Copper is a metal. Draw a labelled diagram to show the bonding in copper.

A student set up a tube as shown in the diagram. [Figure A5.1: Diagram showing a long horizontal tube with cotton wool soaked in hydrobromic acid a...

When 1 mole of sodium hydroxide reacts with excess hydrochloric acid, 57.1 kJ of energy is released. NaOH + HCl → NaCl + H₂O

The structures of graphite and boron nitride are shown below. [Figure B7.1: Diagram showing the layered structures of graphite and boron nitride. K...

A sample of 0.030g of small pieces of magnesium is added to 20cm³ of 0.10mol/dm³ hydrochloric acid. Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)

The structure of glycolic acid can be represented as shown. [Figure B9.1: Structural diagram of glycolic acid showing HO–CH2–COOH.]

Methanol is manufactured by reacting carbon monoxide with hydrogen. The forward reaction is exothermic. CO(g) + 2H2(g) ⇌ CH3OH(g) ΔΗ = – 91 kJ/mol

Choose from the following elements to answer the questions below. aluminium argon carbon copper iodine iron lead magnesium nitrogen oxygen sulfur E...

Plants contain many different types of carbon compounds.

Water for use in the home is treated using carbon and chlorine.

Iron is extracted in a blast furnace. The raw materials required are • iron ore, which contains iron(III) oxide, Fe2O3, • limestone, • coke (carbon...

Two students set up tubes as shown. cotton wool soaked in concentrated hydrochloric acid tube 1 blue litmus paper tube 2 cotton wool soaked in conc...

When one mole of sulfur burns, 247 kJ of energy is released. S(s) + O2(g) → SO2(g)

The structures of diamond and silicon dioxide are shown. silicon atom oxygen atom diamond silicon dioxide