Cambridge & Pearson Edexcel Past Paper Questions

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?

Which formula represents an alkane?

Z is a compound that: • can be formed, as the only other product, when the alkane C₈H₁₈ is cracked to produce butane • decolourises bromine water ...

A carboxylic acid of molecular formula C₄H₈O₂ reacts with an alcohol of molecular formula C₃H₈O to form an ester. What could be the formula of the ...

Some properties of compound J are listed. • It reacts with potassium carbonate to produce carbon dioxide. • It reacts with ethanol to produce a sw...

Which partial structure represents nylon?

A student wants to show that the rate of the reaction between calcium carbonate and dilute hydrochloric acid doubles for every 10 °C rise in temper...

Which row gives the correct tests to identify both ammonia and sulfur dioxide?

Two gases, ammonia and hydrogen chloride, at an equal pressure, are allowed to enter the apparatus shown. After a time, a white solid forms on the ...

The atomic number of cerium, Ce, is 58. A Ce²⁺ ion has 140 nucleons in its nucleus. How many protons, neutrons, and electrons are there in one Ce⁴⁺...

Which statement about solid calcium chloride is correct?

Which statement about the structure or bonding of metals is correct?

The relative molecular mass of a compound is 166. What is a possible molecular formula of this compound?

A mass of 63g of potassium manganate(VII), KMnO₄, is needed for the complete oxidation of 23 g of ethanol, C₂H₅OH, under acidic conditions. How man...

Magnesium can be produced by the electrolysis of molten magnesium chloride, MgCl₂. What are the products formed at the anode and at the cathode dur...

A reaction is exothermic. Which diagram shows the correct energy profile diagram for the reaction and the correct enthalpy change?

Which fraction of petroleum (crude oil) is used as a fuel in aircraft engines?

The equation for photosynthesis is shown. 6CO₂ + 6H₂O → 6O₂ + C₆H₁₂O₆ Which statement about photosynthesis is correct?

Compound X reacts with an acid to produce sulfur dioxide gas. A sample of X is placed in a flask and acid is added. The sulfur dioxide produced is ...

Which reactions involve oxidation and reduction? 1 chlorine gas reacting with aqueous potassium iodide 2 dilute sulfuric acid reacting with magnesi...

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 statemen...

Lead(II) oxide, PbO, reacts with dilute nitric acid, neutralising the acid. Lead(II) oxide also reacts with aqueous sodium hydroxide, neutralising ...

Which pair of reagents are most suitable for the laboratory preparation of copper(II) chloride?

The compounds shown can be used as nitrogenous fertilisers. Which compound has the lowest percentage by mass of nitrogen?

Indium (proton number 49) is in Group III of the Periodic Table. Antimony (proton number 51) is in Group V of the Periodic Table. Which statement c...

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.?

Three elements each show oxidation states of +2 and +3. To which part of the Periodic Table do these elements belong?

Copper(II) oxide reacts with carbon when heated. 2CuO + C → 2Cu + CO₂ Which statement about this reaction is correct?

The diagram shows a cell that can be used to extract a metal from its oxide. Molten aluminium oxide, copper(II) oxide, lead(II) oxide and magnesium...

Aircraft manufacture requires a metal that: 1 has a relatively low density 2 is resistant to corrosion. Which of these conditions does aluminium sa...

Seawater is desalinated to make it drinkable. What is the main substance removed by desalination?

Which diagram shows a branched-chain isomer of butane?

A straight-chain alkene, C₄H₈, undergoes an addition reaction with bromine. What is the possible structure of the product?

The diagram shows the structure of oxalic acid. Which alcohol is oxidised to form oxalic acid?

Some properties of compound J are listed. • It reacts with potassium carbonate to produce carbon dioxide. • It reacts with ethanol to produce a swe...

The diagram shows the formula of nylon. From which compounds could nylon be made?

Choose from the gases to answer the questions. argon carbon dioxide carbon monoxide ethane hydrogen methane neon ozone sulfur dioxide sulfur trioxi...