Cambridge & Pearson Edexcel Past Paper Questions

The diagram shows the repeat unit of a polymer. Which row correctly identifies the monomer and type of polymerisation involved in making this polymer?

Choose from the following compounds to answer the questions. aluminium iodide ethanol glucose lead(IV) chloride lithium bromide magnesium car...

Part of the structures of carbon dioxide and calcium carbide are shown. O=C=O O=C=O O=C=O O=C=O O=C=O O=C=O carbon dioxide (Ca²⁺ C₂²⁻ Ca²⁺ ...

This question is about copper and copper compounds.

This question is about halogens and halogen compounds.

Platinum and vanadium are both transition elements.

The table shows some properties of five alcohols. alcohol | formula | density in g/cm³ | boiling point in °C ---|---|---|--- methanol | CH₃O...

Aluminium is extracted by the electrolysis of molten aluminium oxide.

Dilute nitric acid reacts with aqueous barium hydroxide. 2HNO₃(aq) + Ba(OH)₂(aq) → Ba(NO₃)₂(aq) + 2H₂O(l)

Calcium is a metal in Group II of the Periodic Table.

Choose from the following compounds to answer these questions. aluminium sulfate ammonia calcium carbonate carbon dioxide chlorofluorocarbons coppe...

Part of the structures of chlorine and sodium chloride are shown. [Figure showing representations of chlorine molecules and a sodium chloride latti...

A drop of black ink is placed at the bottom of a beaker of water. After a time, the colour of the ink spreads throughout the water. Explain this ob...

Water from natural sources contains dissolved substances which are not pollutants, such as mineral salts.

Alkenes are made in an oil refinery by cracking hydrocarbons.

Methanoic acid and ethanoic acid are weak acids.

Iron is extracted from iron ore in a blast furnace using limestone and coke (carbon).

This question is about some compounds of sulfur. (a) Dilute sulfuric acid reacts with aqueous sodium hydroxide as shown. H2SO4(aq) + 2NaOH(aq) → Na...

Lead is a metal in Group IV of the Periodic Table.

A student makes aqueous copper(II) sulfate. The student adds an excess of copper(II) oxide powder to warm sulfuric acid and stirs the mixture. Whic...

A mixture of three liquids is separated by fractional distillation. Which statements are correct? 1 The mixture boils at constant temperature throu...

A mixture of four coloured dyes is analysed by chromatography. The result is shown.. Which change will allow the four dyes to be seen?

A compound X, when heated with an aqueous solution of compound Y, produces a gas that turns red litmus blue. Which statements are correct? 1 Y coul...

The rate of diffusion of carbon dioxide and methane is investigated at two different temperatures, one high and one low. Which row correctly shows ...

Which statement about atoms and ions is correct?

The bonding in a molecule of carbon dioxide can be represented by a dot-and-cross diagram. Which diagram is correct?

The relative atomic mass of chlorine is 35.5. What is the mass of 2.0 mol of chlorine gas?

Methane burns in oxygen. CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) 10 cm³ of methane is reacted with 25 cm³ of oxygen. What is the total volume of gas tha...

An aqueous solution is made by dissolving 3.4 g of sodium hydroxide, NaOH, to make 500 cm³ of solution. What is the concentration, in mol/dm³, of t...

Which statement about electrolysis reactions is correct?

The apparatus shown is set up to plate a steel key with copper.. The key does not get coated with copper. Which change needs to be made to plate th...

Which process is endothermic?

The reaction of hydrogen with chlorine to form gaseous hydrogen chloride is exothermic. Which statement is correct?

Which statements about oxidation and reduction are correct? 1 Reduction can involve the loss of oxygen. 2 Oxidation can involve the loss of hydroge...

Aqueous ammonium nitrite, NH4NO2, decomposes when heated. NH4NO2(aq) → N2(g) + 2H2O(l) In this salt, the anion is ......1....... The nitrogen atoms...

Elements X and Y react together in a reversible reaction to form XY2. X + 2Y ⇌ XY2 1.0 mol of X is mixed with 1.0 mol of Y and the mixture is left ...

Two solutions are prepared. • Solution P is 0.050 mol/dm³ hydrochloric acid. • Solution Q is 0.100 mol/dm³ butanoic acid. A 2 cm strip of magnesium...

Which compound can be formed by precipitation?

In a neutralisation reaction, which change in particles occurs?

In order to decide which would be the better nitrogenous fertiliser, a student calculates the percentage by mass of nitrogen in both ammonium sulfa...

The manufacture of sulfuric acid by the Contact process involves the use of three different raw materials. How many of these raw materials are elem...

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

Which statement about elements in the Periodic Table is correct?

Which statement about the properties of the elements in Group VIII of the Periodic Table, helium to xenon, is correct?

Which two statements indicate that metal M may have a proton number between 21 and 30? 1 It conducts electricity. 2 It does not react with water. 3...

Different metals react with water in different ways. Which statement is correct?

Metal X is more reactive than zinc but less reactive than sodium. What would be the best method for obtaining metal X from its ore?

Steel is often galvanised. Which statements about galvanising are correct? 1 Galvanising makes a steel alloy. 2 Galvanising provides a sacrificial ...

In the extraction of aluminium from aluminium oxide, the following three reactions take place. 1 Al3+ + 3e– → Al 2 2O2– → O2 + 4e– 3 C + O2 → CO2 W...

The carbon cycle regulates the amount of carbon dioxide in the atmosphere. Combustion, photosynthesis and respiration are involved in this cycle. H...