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 diagram shows apparatus used to obtain carbon monoxide. What is the main purpose of Y?
The boiling points of various gases found in the air are shown below. °C argon -186 carbon dioxide -78 nitrogen -198 oxygen -183 If the air is co...
The fractional distillation apparatus shown is to be used for separating a mixture of two colourless liquids. A thermometer is missing from the app...
Hydrogen can form both H⁺ ions and H¯ ions. Which one of the statements below is correct?
A dark, shiny solid, X, conducts electricity. Oxygen combines with X to form a gaseous oxide. What is X?
The diagram shows the molecule ethyl propanoate. How many bonding pairs of electrons are there in the molecule?
The conduction of electricity by metals is carried out by the movement of
Which substance could be sodium chloride? conduction of electricity melting point/°C when liquid in aqueous solution A -114 nil good B 180 nil nil...
What is the concentration of iodine molecules, I2, in a solution containing 2.54 g of iodine in 250 cm³ of solution?
The diagram shows the results of an electrolysis experiment using inert electrodes. Which could be liquid X?
The energy profile for the forward direction of a reversible reaction is shown. Which row correctly shows the sign of both the activation energy a...
Which graph represents how the rate of reaction varies with time when an excess of calcium carbonate reacts with dilute hydrochloric acid?
In which reaction is nitric acid acting as an oxidising agent?
A student mixed together aqueous solutions of Y and Z. A white precipitate formed. Which could not be solutions Y and Z? solution Y solution Z A ...
The tests below were carried out on a solution containing ions of the metal X. test observation add sodium chloride solution no change add sodium ...
Which property is common to calcium, potassium and sodium?
Which set of the electronic structures are only found in metals?
The position of metal M in the reactivity series is shown. [Figure 21.1] Which method will be used to extract M from its ore?
When zinc is added to a solution of a metal sulfate, the metal is deposited and zinc ions are produced in solution. Which metal is deposited?
The diagram shows the structure of brass. Why is brass harder than pure copper?
The diagram shows processes that take place in the manufacture of ammonia. What are substances W and X and catalyst Y? W X Y A air oil iron B air...
Sulfur is burnt in air. Which statement about this reaction is correct?
Using the apparatus shown, chlorine is passed through the tube. After a short time, coloured substances are seen at P, Q and R. What are these co...
Which equation in the blast furnace extraction of iron is not a redox reaction?
Which statement about the material used for aircraft bodies is correct? Aircraft bodies are made from
A catalytic converter in a car exhaust system speeds up the change of pollutants into less harmful products. Which change does not occur in a cata...
Which natural process can cause nitrogen oxides to be formed in the atmosphere?
Which type of water in the left hand column is linked correctly to a statement in the right hand column?
An organic compound has an empirical formula C2H4O. What is the compound?
Which formula represents a compound likely to undergo addition polymerisation?
The diagrams show two organic compounds. Which statement about the compounds S and T is correct?
Five structures are shown. Which structures represent identical molecules?
Which statement about ethanol is correct?
In which reaction is water produced?
Polymer X has the structure shown. The list shows four terms that can be applied to polymers. 1 addition polymer 2 condensation polymer 3 polyami...
In a titration between an acid (in the burette) and an alkali, you may need to re-use the same titration flask. Which is the best procedure for rin...
The labels fell off two bottles each containing a colourless solution, one of which was sodium carbonate solution and the other was sodium chloride...
Oxygen was prepared from hydrogen peroxide, with manganese(IV) oxide as catalyst. The oxygen was collected as shown in the diagram. 2H₂O₂ → 2H₂O + ...
Radium (Ra) is in the same group of the Periodic Table as magnesium. What is the charge on a radium ion?
How many of the molecules shown contain only one covalent bond? Cl₂ H₂ HCl N₂ O₂
In which pair is each substance a mixture?
A researcher notices that atoms of an element are releasing energy. Why are the atoms releasing energy?
Which compound contains three elements?
Below are two statements about metals. 1 Metals contain a lattice of negative ions in a 'sea of electrons'. 2 The electrical conductivity of metals...
What is the ratio of the number of molecules in 71 g of gaseous chlorine to the number of molecules in 2 g of gaseous hydrogen? [Relative atomic ma...
What is the relative molecular mass Mᵣ of CuSO₄.5H₂O?
How can sodium be manufactured?
Which statement about the electrolysis of an aqueous solution of copper(II) sulfate with platinum electrodes is correct?
Which pair of statements about the combustion of a carbohydrate and its formation by photosynthesis is not correct?
The following reversible reaction takes place in a closed vessel at constant temperature. P(g) + Q(g) + R(g) ⇌ S(g) + T(g) When the system has reac...