Cambridge & Pearson Edexcel Past Paper Questions

The equation shows the reaction for the manufacture of ammonia. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) Which change will decrease the activation energy of the re...

When bismuth(III) chloride, BiCl₃, is added to water, a reaction occurs and a white precipitate of BiOCl is formed. BiCl₃(aq) + H₂O(l) ⇌ BiOCl(s) +...

Calcium carbonate reacts with dilute hydrochloric acid to produce carbon dioxide. The carbon dioxide is collected using the apparatus shown. The re...

Three separate mixtures of a solution and a solid are made, as shown in the table. The mixtures are warmed. In which mixtures does gas form?

Insoluble salts are prepared by reacting aqueous solutions of soluble salts. A precipitate forms. Which pairs of aqueous solutions form a precipita...

The diagram shows the main stages in the manufacture of an ammonia-based fertiliser. What is happening in the process labelled X?

What is a use of sulfuric acid?

Which property shows an increasing trend in the elements, from Group I to Group VII, across a period of the Periodic Table?

The melting point of lithium is 181 °C. The melting point of sodium is 98 °C. Which statement explains why lithium has a higher melting point than ...

From their position in the Periodic Table, which properties would you expect the elements vanadium, chromium and cobalt to have? 1 variable oxidati...

The diagram shows the structure of an alloy. Which statement about alloys is correct?

The list shows the position of metal X in the reactivity series of metals. Na Al Fe X Cu Ag Which methods could be used to extract metal X? 1 elect...

An old commercial process for aluminium extraction used large quantities of sodium to convert aluminium ions into aluminium atoms. The modern alumi...

Which element is always present in steel?

Aluminium is used to make saucepans because of its apparent lack of reactivity. Which property of aluminium explains its unreactivity?

Pollutant gases are released by the bacterial decay of vegetable matter. The bacterial decay of vegetable matter is the main source of which gas?

Lakes contain a variety of dissolved substances. Which substance is responsible for eutrophication in lakes?

How many of the molecules shown belong to the homologous series of alkanes? C₂H₄ C₃H₈ C₄H₁₀ C₅H₁₀ C₆H₁₄

The diagram shows the structural formula of an organic compound. Which statement about this compound is correct?

Which group is found in alcohols?

An ester is formed from a carboxylic acid and an alcohol. How does the number of carbon, hydrogen and oxygen atoms in an ester differ from the tota...

Which statement about the composition of polymers is correct?

Poly(styrene) is an addition polymer. The partial structure of poly(styrene) is shown. What is the formula of the monomer from which poly(styrene) ...

When heated, magnesium reacts with oxygen in the air to form magnesium oxide, a white powder. A student investigates the change in mass that occurs...

Four substances are heated gently. The temperatures at which they start and finish melting are recorded. Which statement about the substances is co...

Which particle contains the greatest number of electrons?

One atom of element X and two atoms of element Y react to form an ionic compound. Element X forms a positive ion. Which elements could X and Y be?

An element with a high melting point forms an oxide that is gaseous at room temperature. Which type of structure or bonding is present in the element?

Which statement explains why aluminium is malleable?

The incomplete equation for the reaction between ethyne, C2H2, and oxygen is shown. 2C2H2(g) + ....O2(g) → ....CO2(g) + ....H2O(g) When the equatio...

A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen by mass. The relative molecular mass of the compound is between 55 and 65. What is...

Four processes using electrolysis are listed. 1 the electrolysis of concentrated aqueous sodium chloride 2 the electrolysis of dilute sulfuric acid...

A fuel is completely burned in air. Carbon dioxide, water and heat are produced. Which energy profile diagram is correct for burning a fuel?

Solid ammonium chloride is heated. The gases ammonia and hydrogen chloride are formed. This is reaction 1. Ammonia gas is mixed with hydrogen chlor...

In a closed flask, gases Q and R reach a dynamic equilibrium. Q(g) ⇌ 2R(g) ΔH is positive Which change will move the equilibrium to the right?

Which reaction is a redox reaction?

The carbonate, chloride and sulfate of a metal are all soluble in water. What is the metal?

Which fertiliser contains the highest percentage of nitrogen by mass?

Which set of conditions is used in the contact process?

The diagram shows part of the Periodic Table. Which two letters represent elements that can react together to form covalent compounds?

The Group I metals lithium, sodium and potassium show trends in their melting points and in their reactions with water. Which statement is correct ...

The diagram shows the structure of an alloy. Which statement about alloys is correct?

Which pair of reagents will undergo a displacement reaction?

The reactivity series for some metals, with two gaps labelled X and Y, is shown. most reactive K Na Ca Mg X Zn Y Pb (H) Cu Ag least reactive Which ...

Iron can be extracted from the ore haematite, Fe2O3. What is the maximum mass of iron that could be produced from 500 kg of haematite? [Ar: O, 16; ...

Several different treatments are used to purify the water supply. Which impurities can be removed by which treatment?

Which statement about the homologous series of alkanes is correct?

Which compound has the empirical formula with the greatest relative formula mass?

When ethene reacts with steam to form ethanol, which type of reaction takes place?

Poly(lactic) acid is a polymer used to make biodegradable cups. The partial structure of poly(lactic) acid is shown. Which statements apply to poly...