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 domestic water supply is treated to make it safe to drink. Which row identifies the treatment and its effect?
Sodium phosphate, Na3PO4, and ammonium nitrate, NH4NO3, are both used as fertilisers. Which row shows the correct percentage by mass of the element...
Three processes are shown. 1 the decomposition of vegetation 2 emissions from a car engine 3 photosynthesis Which row shows a gas produced in each ...
Which compound is not an alkane, alkene, alcohol or carboxylic acid?
Alkenes can be produced by the cracking of alkanes, such as decane, C10H22. Which equation shows the cracking of decane to produce two different al...
Alkenes undergo addition reactions with bromine to form dibromoalkanes. Which statement is correct?
How many moles of oxygen are required for the complete combustion of 2 moles of ethanol?
Two reactions are shown. reaction 1 CH2CH=CH2OH + H2 (Ni catalyst) → compound X reaction 2 compound X (acidified KMnO4(aq)) → compound Y Which row ...
A section of the structure of a protein is shown. [Displayed formula of protein section] How many amino acid monomer molecules have been used to ma...
Which piece of apparatus is used to measure exactly 27.3 cm³ of a liquid?
A student titrates aqueous sodium hydroxide with 0.1mol/dm³ hydrochloric acid. The titration results are used to calculate the concentration of the...
A mixture of four coloured dyes is analysed by chromatography. The result is shown. [Chromatogram showing four coloured dyes, solvent front, baseli...
An aqueous solution contains cations of metal X. A precipitate forms when a few drops of aqueous sodium hydroxide are added to the solution. The pr...
The pressure of a sample of air is reduced and its temperature remains constant. Which row describes the changes in the volume of the air and the d...
The main component of mineral X is calcium carbonate, CaCO3. X also contains tiny grains of silicon(IV) oxide, SiO2. There are no other substances ...
The structure of hydroxylamine, NH2OH, is shown. Which row about hydroxylamine is correct?
Metals lose electrons when they combine with a non-metal to form an ionic compound. Calcium combines with hydrogen to form the ionic compound calci...
What is a property of diamond?
Which statement about the bonding in copper is correct?
Aluminium ions, Al3+, react with sulfate ions, SO42-, to form aluminium sulfate. Which row shows the correct empirical formula and ionic formula of...
How many atoms are there in 27.0 g of water, H2O?
A mixture of sodium hydrogencarbonate and sodium chloride is heated. The equation for the reaction that takes place when sodium hydrogencarbonate i...
Which row is correct?
Some bond energy data are given in the table. Hydrazine, N2H4, reacts with oxygen, as shown. A value for the enthalpy change, ΔH, of this reaction ...
The rate of reaction between calcium carbonate and dilute hydrochloric acid is measured in three separate experiments. In experiment 1, the calcium...
The equation shows the reversible reaction between nitrogen and hydrogen to form ammonia. N2 + 3H2 ⇌ 2NH3 The forward reaction is exothermic. Which...
Some properties of a solid oxide are listed. • It reacts with dilute sulfuric acid giving a salt and water. • It is insoluble in water. • It reacts...
Two compounds are dissolved separately in water. When the two solutions are mixed, there is no observable change. What are the two compounds?
Part of the Periodic Table is shown. W, X, Y and Z are not the correct symbols of the elements. Which statement is correct?
Chlorine gas is bubbled into separate samples of aqueous potassium iodide and aqueous potassium bromide. In which solutions is there a colour change?
Which statement about the elements in Group VIII of the Periodic Table is correct?
Which elements are the major constituents of brass?
The diagrams show two methods in which metal X is used to prevent the rusting of iron. A student suggests that metal X must be less reactive than i...
Aluminium is extracted from molten aluminium oxide by electrolysis. Which material is used for the electrodes in the industrial extraction?
Which substance is used to remove odours in the treatment of the domestic water supply?
Carbon dioxide, methane and oxygen are gases involved in the carbon cycle. Which of these gases cause global warming?
How many structural isomers are there with the molecular formula C4H9Cl?
P is a branched hydrocarbon with the ratio of carbon atoms to hydrogen atoms being 1:2. P has a relative molecular mass of 56. What is the identity...
Which row gives the correct names of the two compounds?
Which equation represents the reaction of ethane with chlorine in the presence of ultraviolet light?
Which compound reacts with hydrogen in an addition reaction?
The structures of X and Y are shown. What is the structure of the polymer formed when X and Y react together?
Which diagram shows a measuring cylinder?
A chromatogram of mixture X and pure substances P, Q, R and S is shown. Which statement is correct?
A colourless solution of compound W is tested separately with a few drops of aqueous sodium hydroxide and a few drops of aqueous ammonia. No precip...
Which compound contains two different elements with identical oxidation states?
For the element sulfur, which pair of ionisation energies has the largest difference between them?
Which ion has both more electrons than protons and more protons than neutrons? [H = ¹H; D = ²H; O = ¹⁶O]
Which species contains the smallest number of electrons?
Nitric oxide, NO, and bromine vapour react together according to the following equation. 2NO(g) + Br₂(g) → 2NOBr(g) ΔH = -23 kJ mol⁻¹ The reaction ...