Cambridge & Pearson Edexcel Past Paper Questions
Browse 35,704 questions from Cambridge O-Level & A-Level and Pearson Edexcel IGCSE & IAL exams. Click any question to practice.
The flow chart shows the reactions of metal A and some of its compounds. [Figure shows a flow chart starting with 'metal A'. 'metal A' reacts with ...
Alkanes are a homologous series of hydrocarbons.
Butan-1-ol, CH3CH2CH2CH2OH, and ethanol, CH3CH2OH, are both alcohols. Alcohols, such as ethanol, react with sodium to form hydrogen. 2CH3CH2OH + 2N...
When iron is heated with steam in a sealed container, an equilibrium mixture is obtained. 3Fe(s) + 4H2O(g) ⇌ 4H2(g) + Fe3O4(s) ΔH = +35 kJ/mol
Astatine, At, is an element in Group VII of the Periodic Table. The table shows some information about two isotopes of astatine. [Table with rows f...
The fractional distillation apparatus shown is being used to separate a mixture of two liquids. A thermometer is missing from the apparatus. Where ...
The table shows the results of two reactions of an aqueous solution of a salt. What is the name of the salt?
Limestone reacts with hydrochloric acid. Changing which reaction condition does not affect the rate of reaction?
A particle contains 34 protons, 45 neutrons and 36 electrons. Which symbol is correct for this particle?
Which molecule contains three shared pairs of electrons between two of its atoms?
What happens when sodium chloride melts?
Which compound contains only eight covalent bonds?
Which substance has metallic bonding?
A gas cylinder is placed in each of the four corners of a square room. Each cylinder contains a different gas stored under the same pressure. The g...
Powdered calcium carbonate reacts with dilute hydrochloric acid to produce calcium chloride, water and carbon dioxide. Which is the correct ionic e...
What is the relative molecular mass, Mr, of CuSO₄.5H₂O?
1.00 dm³ of ammonia gas is passed over heated copper(II) oxide. 3CuO(s) + 2NH₃(g) → 3Cu(s) + N₂(g) + 3H₂O(l) What is the volume of nitrogen formed ...
What are the correct anode (positive electrode) and cathode (negative electrode) products when aqueous copper(II) sulfate is electrolysed using cop...
Concentrated aqueous sodium chloride is electrolysed using inert electrodes. Which statement about this electrolysis is correct?
The diagram shows the energy profile of a chemical reaction. Two energy changes are labelled X and Y. Which statement about the reaction is correct?
In the graph, curve 1 was obtained by observing the decomposition of 100 cm³ of 1.0 mol/dm³ hydrogen peroxide solution, catalysed by manganese(IV) ...
The equation shows a redox reaction between iron(II) chloride and chlorine gas. 2FeCl₂ + Cl₂ → 2FeCl₃ Which equation describes the reduction proces...
Which row correctly describes the oxides?
Which substance is insoluble in water?
In which of these equilibria is the forward reaction favoured by an increase in pressure?
The Contact process, the Haber process and the hydrogenation of fats all involve the use of a catalyst. Which row correctly describes whether the c...
Which element is sodium?
A non-metal element forms oxides of the type XO₂ and XO₃. What is X?
Aluminium reacts with chromium(III) oxide as shown. aluminium + chromium(III) oxide → chromium + aluminium oxide Which statements are correct? 1 Al...
Using the Periodic Table for the relative atomic masses, which has the least mass?
The diagram shows how an underwater iron pipe can be protected from rusting. Metal Z can be ..........1.......... because it is ..........2...........
Brass is an alloy. Which statement about brass is correct?
Which item is made from mild steel?
The table shows the composition of exhaust gases from an internal combustion engine. What is gas Y?
Which two gases do not damage limestone buildings?
Iron(III) oxide can be reduced to iron by carbon. Which other element can reduce iron(III) oxide to iron?
An ammonium salt was added to excess hot aqueous sodium hydroxide. Ammonia gas was evolved. When no more ammonia was evolved, aluminium was added t...
Two esters have the same molecular formula, C₃H₆O₂. What are the names of these two esters? 1 methyl ethanoate 2 ethyl propanoate 3 ethyl methanoat...
Which statement is correct?
When cracked, one mole of a compound, X, produces one mole of propene and one mole of hydrogen. X → C₃H₆ + H₂ What type of compound is X?
Which is a correct definition of isomers?
Which of the following has not been prepared by reacting a carboxylic acid with an alcohol?
Which of these polymers is a protein?
In the addition polymer poly(propene), what is the simplest ratio of carbon atoms to hydrogen atoms?
Which statement about vegetable oil and the margarine made from it is correct?
The concentration of aqueous sodium carbonate can be found by reaction with hydrochloric acid of known concentration using the indicator methyl ora...
Which molecules all contain one or more double covalent bonds?
The metals Cr, Co, Fe and Mn are all transition elements. Which particles have the same number of electrons?
Which substance has metallic bonding?
The table shows the results of two reactions of an aqueous solution of a salt. reagents: excess aqueous sodium hydroxide, final observation: white ...