Cambridge & Pearson Edexcel Past Paper Questions

Which row shows the correct state symbols for the reaction between calcium carbonate and dilute hydrochloric acid? (The conditions are room tempera...

The expression shown for the value of Ar for fluorine is incomplete. Ar (fluorine) = Which row should the gaps in the expression be correctly compl...

A mixture of 5 cm³ of CH4 and 100 cm³ of air is exploded. Assume air is 80% N2 by volume and 20% O2 by volume. The resulting mixture is cooled. All...

The chloride of metal X is dissolved in water. A concentrated solution of this chloride is electrolysed using inert electrodes. X is above sodium i...

Which change in conditions, for the reaction between zinc and dilute sulfuric acid, increases the rate of reaction by lowering the activation energy?

Many reactions can be classified as redox reactions. Which equations show redox reactions? 1 Mg + 2HCl → MgCl2 + H2 2 2FeCl2 + Cl2 → 2FeCl3 3 2Na +...

Which row correctly shows whether the hydrogen ion concentration and the pH of ethanoic acid are higher or lower than those of hydrochloric acid of...

Two fertilisers are made by mixing chemical compounds. Fertiliser X contains 500 g of NH4NO3 and 500 g of (NH4)2SO4 per kilogram. Fertiliser Y cont...

Which processes occur in the manufacture of sulfuric acid? 1 burning sulfur in air 2 dissolving sulfur dioxide in sulfuric acid 3 dissolving sulfur...

Chlorine is passed into separate samples of aqueous potassium iodide and aqueous potassium bromide. In which solutions is there a colour change?

Which equation shows a thermal decomposition that occurs in the blast furnace?

Aluminium is produced by the electrolysis of pure aluminium oxide. One of the electrodes in the process has to be replaced often. Which statement i...

Sea water has to be purified in order to obtain drinking water from it. Which processes are used to purify the sea water?

Which structure represents an isomer of butane?

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?