Cambridge & Pearson Edexcel Past Paper Questions

Which oxide can be reduced to the metal by roasting with powdered iron?

Which element, if attached to iron immersed in salt water, would prevent the iron from corroding?

The final reaction in the extraction of metal X is represented by the following equation. X2O3 + 3CO → 2X + 3CO2 What is X?

Hydrated sodium carbonate decomposes when heated in a Bunsen burner flame. Which equation shows this decomposition correctly?

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

Which ion is present in both sewage and fertilisers and can cause eutrophication when it enters rivers?

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...

How many of the structures show an unsaturated hydrocarbon molecule?

Which statements are correct for alkenes but not for alkanes? 1 They turn aqueous bromine from brown to colourless. 2 Their general formula is CnH2...

Wine is an alcoholic drink that contains ethanol. If wine is left exposed to the air for too long, it can become acidic. This is because the ethano...

Polymer Z has the structure shown. These four terms can be used to describe polymers. 1 addition polymer 2 condensation polymer 3 polyamide 4 polye...

The diagram shows the structure of poly(dichloroethene).n-] Which statement about this polymer is correct?

How can the following reaction be described? C8H18 → C4H10 + 2C2H4

The structures of four hydrocarbons, W, X, Y and Z, are shown. Which row is correct?

Choose from the following polymers to answer the questions. [Diagrams of Terylene, PTFE, nylon, starch, poly(propene), PVC, protein, polyester, pol...

Hydrogen sulfide, H2S, has a simple molecular structure. It is soluble in water.

Esters, such as propyl ethanoate, are often used as solvents.

Ammonia is manufactured by the reaction between hydrogen and nitrogen in the Haber process.

The statements give some of the chemical properties of metal X and its compounds. • X does not react with cold water. • X fizzes slowly with dilute...

The atmosphere contains a large number of gases including oxygen, nitrogen, carbon dioxide, sulfur dioxide, oxides of nitrogen, methane and chlorof...

Silver nitrate has the formula AgNO3.

Cyclohexane, C6H12, is a cycloalkane. Cycloalkanes react in a similar way to alkanes. [Diagram of cyclohexane] cyclohexane

Carbon reacts with steam in a reversible reaction. C(s) + H2O(g) ⇌ H2(g) + CO(g) ∆H = +131kJ/mol The reaction reaches an equilibrium if carried out...

Both zinc and iron react with dilute sulfuric acid. Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) Fe(s) + H2SO4(aq) → FeSO4(aq) + H2(g)

Choose from the following polymers to answer the questions. polymer A [Figure: Structure of Polymer A showing repeating unit -C(=O)-N(H)-R-N(H)-C(...

Hydrogen fluoride, HF, has a simple molecular structure. It is soluble in water.

Esters are used as food flavourings and solvents.

Sulfuric acid is manufactured by the contact process.

The statements give some of the chemical properties of cobalt and its compounds. • Cobalt does not react with cold water. • Cobalt fizzes slowly wi...

River water contains dissolved minerals and gases.

The formula of lead(II) nitrate is Pb(NO3)2.

Cyclohexene, C6H10, is a cycloalkene. Cycloalkenes react in a similar way to alkenes. [Figure: Structure of cyclohexene with 6 carbons in a ring, ...

Carbon monoxide reacts with hydrogen in a reversible reaction. CO(g) + 2H2(g) ⇔ CH3OH(g) ∆H = −91 kJ/mol The reaction reaches an equilibrium if car...

Manganese(IV) oxide, MnO2, can be used in the preparation of both chlorine and oxygen. Reaction 1 MnO2(s) + 4HCl(aq) → Cl2(g) + 2H2O(l) + MnCl2(aq)...

Gas X has the following properties. 1 colourless 2 no effect on either red or blue litmus papers 3 no effect on limewater 4 flammable What is gas X?

A gas is evolved during a reaction. Which two pieces of apparatus would enable the rate of this reaction to be measured?

Which statement about pure hexane, C6H14, is correct?

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

An aqueous solution of zinc chloride is tested by adding reagents. Which observation is correct? reagent added to zinc chloride (aq) observations...

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

Which substance has a giant covalent structure and contains atoms of more than one element?

Which statement correctly explains why chlorine, Cl2, at 40°C diffuses more slowly than neon, Ne, at 20 °C?

Metals conduct electricity. The movement of which particles is responsible for this conductivity?

Which substance, when molten, conducts electricity?

A compound contains 70% by mass of iron and 30% by mass of oxygen. What is its empirical formula? [Ar: O, 16; Fe, 56]

The formula for hydrated copper(II) nitrate is Cu(NO3)2.XH2O. It contains 36.5% water of crystallisation by mass. What is the value of x? [Ar: Η,...

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

Concentrated aqueous calcium iodide undergoes electrolysis in a similar way to concentrated aqueous sodium chloride. What would be formed at each ...

Aluminium is obtained by the electrolysis of molten aluminium oxide. Which row shows the electrode at which aluminium is formed and the correct eq...

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