Cambridge & Pearson Edexcel Past Paper Questions

Acids are neutralised by alkalis.

Calcium chloride, CaCl₂, is an ionic compound.

Ethanol and butanol are both alcohols. H H H—C—C—O—H H H ethanol H H H H H—C—C—C—C—O—H H H H H butanol

Photosynthesis is a reaction that occurs in the leaves of green plants. Carbon dioxide and water are converted into glucose and oxygen. 6CO₂ + 6H₂O...

Copper reacts with concentrated nitric acid. Cu(s) + 4HNO₃(aq) → Cu(NO₃)₂(aq) + 2NO₂(g) + 2H₂O(l)

Iodine reacts with chlorine to form iodine(I) chloride, ICl. I₂ + Cl₂ → 2ICl Iodine(I) chloride reacts in a similar way to both iodine and chlorine.

Neon, argon, krypton and xenon are four of the noble gases. They are monatomic elements.

The table shows some information about the homologous series of unbranched carboxylic acids. name | structure | boiling point/°C --- | --- | --- me...

Choose from the following chlorides to answer the questions. ammonium chloride calcium chloride carbon tetrachloride copper(II) chloride hydrogen ...

The table shows some information about six particles. (a) Complete the table. particle | proton (atomic) number | number of neutrons in particle |...

Acids are neutralised by insoluble bases. (a) Magnesium chloride is a soluble salt that can be prepared from an insoluble base.

Sodium oxide, Na₂O, is an ionic compound.

Ethanoic acid and butanoic acid are both carboxylic acids. H O-H H-C-C=ʬ H ethanoic acid HHH O-H H-C—C—C—C ΗΗΗ butanoic acid

Respiration is a reaction that takes place in living cells to release energy. The overall reaction involves the oxidation of glucose. C₆H₁₂O₆ + 6O₂...

Copper reacts with hot concentrated aqueous sulfuric acid. Cu(s) + 2H₂SO₄(aq) → CuSO₄(aq) + SO₂(g) + 2H₂O(l)

Nitrogen dioxide, NO₂, reacts with itself to make dinitrogen tetroxide, N₂O₄, in an exothermic reaction. This reaction is investigated at 140°C in ...

Methane, ethane and propane are all gases at room temperature.

The table shows some information about the homologous series of unbranched alcohols. name | structure | boiling point / °C ---|---|--- methanol | ...

A gas is less dense than air and dissolves in water. Which diagram shows the correct method of collecting this gas?

Which mixture can be separated into its components by adding water, stirring and filtering?

Tests were carried out on an aqueous solution of an unknown compound, P. The observations are recorded in the table. test observation aqueous sodi...

Which substance would diffuse most quickly?

The ion Q²⁺ has three complete shells of electrons. What is Q?

The diagrams show the arrangement of particles in three solids: X, Y and Z. The three solids are krypton, potassium and sodium chloride. Which row ...

In the electrolysis of CuSO₄(aq), what is the ionic equation for the reaction at the cathode?

Ethane, C₂H₆, and ammonia, NH₃, are covalent compounds. The dot-and-cross diagrams of these compounds are shown. Which statements are correct? 1 A...

When 1 volume of gas R reacts with exactly 5 volumes of oxygen, it forms carbon dioxide and water only. What is R?

Two characteristics of a gas, G, are given. • G reduces copper(II) oxide to a pink-brown solid. • 1.4 g of G has a volume of 1.2 dm³ at room tempe...

The relative formula masses of four compounds are given. A student has a 1.0 g sample of each compound. Which sample contains the highest number of...

The diagrams show an electrolysis experiment using inert electrodes. What could liquid Y be?

Which statement about ionic compounds is correct?

The diagram shows apparatus that can be used to extract aluminium from its ore. What are J, K and L?

The diagram shows the energy profile for a reaction. Which statements about this reaction are correct? 1 More energy is needed to break the bonds ...

The diagram shows the fractionation of petroleum (crude oil). Which row shows the correct use for the fraction? fraction use A bitumen as a lubric...

Which compound is a constituent of petroleum (crude oil)?

A student wrote two conclusions about calcium carbonate. conclusion 1 The reaction with dilute hydrochloric acid is faster with powdered calcium c...

A compound decolourises acidified potassium manganate(VII). What could this compound be? 1 magnesium chloride, MgCl₂ 2 iron(II) chloride, FeCl₂ 3 ...

Nitrogen reacts with oxygen in an equilibrium reaction. N₂(g) + O₂(g) ⇌ 2NO(g) ΔH = +170 kJ/mol When the reaction is at equilibrium, which s...

A solution of W has the following properties. • When added in excess to solid ammonium chloride, a gas is given off that turns damp red litmus pap...

Pure lead(II) sulfate is prepared by mixing two substances, X and Y. When the reaction is complete the mixture is filtered. Pure lead(II) sulfate i...

What are the percentages by mass of nitrogen in ammonium nitrate, NH₄NO₃, and in calcium nitrate, Ca(NO₃)₂? % nitrogen in NH₄NO₃ % nitrogen in Ca(...

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

The positions of four elements are shown on the outline of part of the Periodic Table. Which element is a solid non-metal at r.t.p.?

What is not a typical property of transition elements?

Which statement about the reactions of some metals and metal compounds is correct?

Which metal is used in the galvanising of iron?

Iron is obtained in the blast furnace from the ore haematite. Which process takes place in the blast furnace?

Aluminium is a Group III element. It is extracted from its ore by electrolysis. The position of aluminium in the Periodic Table indicates that its...

Which pair of gases are both non-acidic?

Which term correctly describes the conversion of seawater into drinkable water?