Cambridge & Pearson Edexcel Past Paper Questions

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...

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 2H2...

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 yi...

Magnesium carbonate reacts with dilute hydrochloric acid to form magnesium chloride, carbon dioxide and water. MgCO3(s) + 2HCl(aq) → MgCl2(aq) + C...

At the start of a reaction, a 1.00 dm³ solution contains 0.300 mol of ethanol. After 100 seconds the concentration of the ethanol has decreased to...

Which statement about sulfuric acid is correct? Sulfuric acid is used

Which row shows the order of increasing pH (lowest to highest) for strong acids, strong bases, weak acids and weak bases at the same concentration?...

The table shows the proton numbers of four elements. element Q R T Z proton number 9 11 17 19 Which statement is correct?

The diagram shows part of the Periodic Table. Which row about the elements W, X and Y is correct? combines with oxygen in the ratio 2:3 exists as...

Lead(II) sulfate can be made by reacting dilute sulfuric acid with which substance?

Which pair gives two uses of argon?

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

Which row has the correct catalyst for the named process? process catalyst A contact process vanadium(V) oxide B Haber process manganese(IV) oxide...

Some metals and the compounds in their ores are shown. metal Al Ca Pb Na Fe Mg compound in their ore Al2O3 CaCO3 PbS NaCl Fe2O3 MgCO3 Which type ...

After the collapse of a river bridge, a new car was immersed in the river water for several months. When it was recovered, the parts of the car ma...