Cambridge & Pearson Edexcel Past Paper Questions

Which statement about the organic compounds CH4, C2H4, C2H6 and C3H8 is correct?

The alkenes are a homologous series. Which statement about alkenes is correct?

Which organic compound is used as a solvent, a renewable fuel and in the production of vinegar?

Which structure shows the carboxylic acid with the lowest relative molecular mass?

What is the name of the ester shown?

The diagram shows the structure of a monomer. Which diagram shows the partial structure of its polymer?

Choose from the following oxides to answer the questions. calcium oxide carbon monoxide copper(II) oxide nitrogen dioxide nitrogen monoxide silico...

Part of the reactivity series is shown. calcium more reactive aluminium manganese zinc less reactive

The equation for the decomposition of hydrogen peroxide is shown. 2H2O2 -> 2H2O + O2 A sample containing 1.00 mol of hydrogen peroxide is completel...

The table shows some properties of five esters. | name | structure | relative molecular mass | melting point /°C | boiling point /°C | |---|---|---...

Hydrochloric acid, HCl, reacts with barium hydroxide, Ba(OH)2, as shown. 2HCl(aq) + Ba(OH)2(aq) -> BaCl2(aq) + 2H2O(l) A sample of 25.0 cm³ of 0.05...

The structures of two carboxylic acids are shown. HO H-C-C-O-H H ethanoic acid HHHO H-C-C-C-C-O-H HHH carboxylic acid B

Carbon dioxide is a colourless gas found in air.

This question is about the chlorides of the elements in Period 3.

Iron is a transition element.

Fractional distillation and cracking are important processes in the conversion of petroleum (crude oil) into useful substances.

Choose from the following chlorides to answer the questions. aluminium chloride ammonium chloride calcium chloride hydrogen chloride iron(III) chlo...

Hydrogen reacts with oxygen as shown in the equation. 2H2(g) + O2(g) → 2H2O(l) A sample containing 1.00 mol of hydrogen, H2, is completely combuste...

The table shows some properties of five esters. name | structure | relative molecular mass | melting point /°C | boiling point / °C ---|---|---|---...

Part of the reactivity series is shown. magnesium aluminium zinc chromium iron more reactive less reactive

Sulfuric acid, H2SO4, reacts with sodium hydroxide, NaOH, as shown. H2SO4(aq) + 2NaOH(aq) → Na2SO4(aq) + 2H2O(l) A sample of 25.0 cm³ of 0.0500 mol...

The structures of two alcohols are shown. [Figure showing the structural formula of ethanol (CH3CH2OH) and alcohol B (CH3CH2CH2CH2OH, butanol)]

This question is about some of the oxides of the elements in Period 3.

Copper is a transition element.

Sulfur dioxide is a colourless gas which can be found in air.

A student has to measure 28.2 cm³ of aqueous sodium bromide. Which piece of apparatus should the student select?

Which property of a liquid ester can be used to check its purity before use as a food flavouring?

Which sequence of procedures is used to separate a pure, dry sample of hydrated copper(II) sulfate, CuSO₄•5H₂O, from a mixture containing hydrated ...

J is an aqueous solution. On addition of aqueous sodium hydroxide to J a green precipitate is formed. The resulting mixture is heated and no gas is...

Gas X has the following properties. 1 colourless 2 no effect on either damp red or blue litmus papers 3 no effect on limewater 4 flammable What is ...

Which particle contains most electrons?

The diagrams show the structures of two solids, P and Q. Which row is correct?

What is a covalent bond?

The empirical formula of compound X is CH₂ and the relative molecular mass, Mᵣ, of X is 70. What is the molecular formula of X?

A chemist wants to make calcium nitrate. They start with 8.00 g of pure calcium oxide and an excess of dilute nitric acid. They produce 12.65 g of ...

How many elements combine to form the compound ammonium sulfate?

An aqueous mixture of copper(II) nitrate and silver nitrate is electrolysed with pure copper electrodes. Which half-equation correctly describes th...

The diagram shows the electrolysis of concentrated and dilute aqueous sodium chloride using inert electrodes. Gases are produced and collected in e...

Which positive ions are present in aqueous copper(II) sulfate?

These statements refer to hydrogen and its use as a fuel. 1 Both water and hydrocarbons can be used as a source of hydrogen. 2 In a fuel cell hydro...

Ethanol is produced by the fermentation of glucose from sugar cane. In some countries ethanol is used as a fuel. Which statements are correct? 1 Su...

Which changes will speed up a chemical reaction? 1 decreasing the pressure in a reaction between gases 2 increasing the size of the solid particles...

Magnesium reacts with dilute sulfuric acid. Mg(s) + H₂SO₄(aq) → MgSO₄(aq) + H₂(g) Two experiments are carried out at 25 °C. experiment 1 24.0 g of ...

In which equations is the change in the underlined species correct? 1 CH₄ + 2O₂ → CO₂ + 2H₂O -oxidation 2 2H₂S + SO₂ → 3S + 2H₂O -reduction 3 BrO₃⁻...

The Haber process converts nitrogen and hydrogen into ammonia. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) Which row is correct?

Which row shows the pH values for 0.1 mol/dm³ solutions of ammonia, hydrochloric acid, sodium chloride and sodium hydroxide?

The water in a lake is acidic and the fish are dying. The water in the lake needs to be neutralised. Which compound can be added in excess to neutr...

Two incomplete statements about the preparation of an insoluble salt are given. .......1....... can be used to prepare insoluble salts, such as ......

The Haber process is used to make ammonia at a temperature of 400 °C and a pressure of 20 000 kPa. The temperature is changed to 500 °C but the pre...

Some properties which indicate the differences in elements are listed. 1 metallic character 2 number of electron shells in an atom 3 number of prot...