Cambridge & Pearson Edexcel Past Paper Questions

The scheme shows a sequence of reactions starting from compound Y. What could the compound Y be?

The apparatus shown can be used to find the rate of some chemical reactions. The rate of which reaction can be followed using this apparatus?

Crude oil is fractionally distilled in a fractionating column. The positions at which fractions X and Y are collected are shown. Which statement is...

An ion X⁺ has 23 nucleons and 10 electrons. What does the nucleus of X contain?

Which element exists as a macromolecule?

Which substance can conduct electricity by the movement of ions?

The diagram shows the molecule ethyl propanoate. Consider all the electrons in a molecule of ethyl propanoate. How many electrons not involved in b...

Sodium and magnesium are next to each other in the Periodic Table. Which statement explains the differences in the melting and boiling points of th...

Sulfuric acid and potassium hydroxide can react together to form potassium hydrogensulfate, KHSO4, and water only. Which amounts of the reactants a...

The diagram shows the structures of the atoms of elements L and M. The elements combine to form a compound. What is the mass of one mole of this co...

A concentrated aqueous solution of sodium chloride is electrolysed. What are the equations for the reactions taking place at the cathode (negative ...

What is observed during the electrolysis of aqueous copper(II) sulfate using carbon electrodes?

Nitrogen monoxide is an atmospheric pollutant that is formed in car engines by the reaction between nitrogen and oxygen. N₂(g) + O₂(g) → 2NO(g) ΔΗ ...

Which substance does not react with hydrochloric acid?

The table shows the energy released by the complete combustion of some compounds used as fuels. Which fuel releases the least energy when 1 g of th...

In which circuit does the bulb light?

Ammonia is made by a reversible reaction between nitrogen and hydrogen. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) ΔΗ = −92 kJ/mol What is the effect of increasing t...

Which change involves reduction?

Samples of three oxides, X, Y and Z, were added separately to dilute hydrochloric acid and to dilute sodium hydroxide. X and Y react with dilute hy...

Which process does not involve the use of a transition element?

Element Q is in Period 3 of the Periodic Table. It can form ions with the formula Q³⁻. Which element is most likely to be Q?

Aluminium is extracted from its molten oxide ore by electrolysis whereas zinc is extracted by reduction of its oxide when heated with coke. Which s...

In which solid can layers of atoms slide over each other?

Which ion causes the acidity in dilute hydrochloric acid?

Which gas turns moist blue litmus paper red and produces a precipitate when bubbled through calcium hydroxide solution?

The diagram shows three steps in the manufacture of sulfuric acid. In which steps is a catalyst used?

Which property of compounds in a homologous series is correct?

Which process is an example of cracking?

Compound X and compound Y combine to form a polymer. Which of the statements about the polymer and its formation is not correct?

The structural formulae of some organic compounds are shown below. Which compounds are alcohols?

What is the partial structure of the polymer formed by the polymerisation of propene, CH₃CH=CH₂?

Choose from the following gases to answer the questions below. CCIF3 CH4 CO CO2 H2 N2 NH3 O2 SO2 Each gas can be used once, more than once or not a...

Farmers use chemicals to improve crop yield. Ammonium phosphate, (NH4)3PO4, is used as a fertiliser and calcium hydroxide, Ca(OH)2, is used to redu...

Proteins, carbohydrates and fats are natural macromolecules. The partial structure of a protein is shown below. [Figure shows a repeating peptide l...

Only liquids that contain moving ions can be electrolysed. These liquids are called electrolytes. (a) Complete the following table which shows the ...

Haematite, limestone and coke are heated together in a blast furnace in the manufacture of iron.

The flow chart shows the reactions of metal A and some of its compounds. [Figure shows a flow chart starting with 'metal A'. 'metal A' reacts with ...

Alkanes are a homologous series of hydrocarbons.

Butan-1-ol, CH3CH2CH2CH2OH, and ethanol, CH3CH2OH, are both alcohols. Alcohols, such as ethanol, react with sodium to form hydrogen. 2CH3CH2OH + 2N...

When iron is heated with steam in a sealed container, an equilibrium mixture is obtained. 3Fe(s) + 4H2O(g) ⇌ 4H2(g) + Fe3O4(s) ΔH = +35 kJ/mol

Astatine, At, is an element in Group VII of the Periodic Table. The table shows some information about two isotopes of astatine. [Table with rows f...

The fractional distillation apparatus shown is being used to separate a mixture of two liquids. A thermometer is missing from the apparatus. Where ...

The table shows the results of two reactions of an aqueous solution of a salt. What is the name of the salt?

Limestone reacts with hydrochloric acid. Changing which reaction condition does not affect the rate of reaction?

A particle contains 34 protons, 45 neutrons and 36 electrons. Which symbol is correct for this particle?

Which molecule contains three shared pairs of electrons between two of its atoms?

What happens when sodium chloride melts?

Which compound contains only eight covalent bonds?

Which substance has metallic bonding?

A gas cylinder is placed in each of the four corners of a square room. Each cylinder contains a different gas stored under the same pressure. The g...