Cambridge & Pearson Edexcel Past Paper Questions

Compound Y reacts with oxygen. This reaction has a positive enthalpy change of reaction, ΔΗ. What information can be deduced about Y and its reacti...

Sulfur trioxide is produced by the following reaction. 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔΗ = –195 kJ Which change in conditions would produce a ...

Magnesium reacts with dilute sulfuric acid. Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g) Two experiments were carried out. experiment 1 24.0 g of magne...

Which statement is correct for both aluminium and iron?

A household cleaning compound is used to remove calcium carbonate from bathroom surfaces. The compound reacts with the calcium carbonate to form a ...

Dilute hydrochloric acid is added separately to samples of copper, copper(II) oxide and copper(II) carbonate. Which row correctly shows whether cop...

Which ions are present when hydrochloric acid has exactly neutralised aqueous sodium hydroxide?

Which experiment will result in the formation of a white precipitate?

Which statement about both the Group I and Group VII elements is correct?

The elements helium, argon and neon are noble gases. Which statement is correct?

Which row shows the correct catalyst for each industrial process?

In the solid state, germanium has the same structure as diamond. What is the likely melting point of germanium?

Aluminium is a metal that is often used to make caps for bottles. When thrown away and buried in the soil, the caps do not corrode. Why is this?

Which statement about Group I metals is correct?

Dry air is a mixture of gases of which 99% is nitrogen and oxygen. What is the main constituent of the remaining 1%?

Why is chlorine added to the water supply?

When the alcohol of molecular formula C4H10O is oxidised, what is the molecular formula of the acid formed?

The diagrams show the structures of five hydrocarbons. Which three hydrocarbons are isomers of each other?

Which alcohol and acid will react together to make the ester CH3COOC2H5?

Which compound has a pH of less than 7 in aqueous solution?

A1 (a) Choose from the following elements to answer the questions. calcium chlorine chromium copper krypton nitrogen oxygen sodium sulfur Each elem...

A2 Copper(II) sulfate is an ionic compound.

A3 The diagram shows the structure of a metal. Key + metal ion – electron [Figure 6.1: A lattice of positive metal ions with a sea of delocalised e...

A4 The structure of malic acid is shown. [Figure 8.1: Structural formula of malic acid, H-OOC-CH(OH)-CH₂-COOH]

A5 Hydrocarbons undergo complete combustion to form carbon dioxide and water.

B6 Ethanoic acid is a weak acid.

B7 Some properties of the Group IV elements are shown in the table. element | melting point /°C | relative electrical conductivity carbon (diamond)...

B8 Concentrated aqueous ammonia is used to make fertilisers such as ammonium phosphate, (NH4)3PO4-

B9 Cyclopropane is converted to propene when heated. [Figure 18.1: Diagram showing cyclopropane (H₂C-CH₂-CH₂) converting to propene (CH₃CH=CH₂)]

Choose from the following elements to answer the questions. aluminium carbon hydrogen iron magnesium nitrogen oxygen sodium vanadium Each element m...

Sodium chloride, NaCl, and magnesium chloride, MgCl2, are both ionic compounds.

Metals have characteristic physical properties such as good electrical and thermal conductivity.

Lavandulol is found in lavender plants. CH3 CH2 C=CH−CH2−CH−C CH3 CH3 CH2OH

Dilute ethanoic acid reacts with sodium carbonate. Sodium ethanoate, CH3COONa, and two other compounds are formed.

At high temperatures, hydrogen reacts with iodine to form hydrogen iodide. H2(g) + I2(g) ⇌ 2HI(g) ΔH = + 53.0 kJ/mol

The table shows the melting points and relative electrical conductivities of three elements from Period 3 of the Periodic Table. property element m...

Potassium nitrate, potassium sulfate and potassium phosphate are used in fertilisers.

Nitrogen(V) oxide decomposes on heating to form nitrogen(IV) oxide and oxygen. 2N2O5(g) → 4NO2(g) + O2(g) The table shows how the rate of reaction ...

A student titrates aqueous sodium hydroxide from a burette with dilute hydrochloric acid in a conical flask. After the titration is complete, the c...

A substance dissolves in water to form a colourless solution. This solution reacts with aqueous silver nitrate in the presence of dilute nitric aci...

Which row shows the numbers of particles in ³⁴S²⁻?

Which substance has a giant covalent structure at room temperature?

Magnesium oxide has a high melting point. It is used to line the inside of furnaces that operate at high temperatures. Why does magnesium oxide hav...

What is the dot-and-cross diagram for NCl₃?

Two properties of a metal are given. 1 It is malleable. 2 It conducts electricity. Which of these properties are due to the layers of positive ions...

What are the relative formula masses of one mole of solid magnesium and one mole of gaseous chlorine?

Complete combustion of a hydrocarbon produces only carbon dioxide, CO₂, and water, H₂O. C₅H₁₂(l) + 8O₂(g) → 5CO₂(g) + 6H₂O(g) When 0.1 mol of the h...

Electrolysis is used to plate a metal statue with silver. The statue is an electrode in a suitable electrolyte. Which row is correct?

Which statements about endothermic reactions are correct? 1 Energy is absorbed from the surroundings. 2 Energy is released to the surroundings. 3 T...

The equation represents the reaction between two gases, X₂ and Y₂, to form compound XY. X₂(g) + Y₂(g) ⇌ 2XY(g) The energy profile diagram for the r...