Cambridge Past Paper Questions
Browse 23,045questions from 25 years of O-Level & A-Level exams. Click any question to practice.
What is the correct name for the compound shown? [Figure 21.1]
A polymer has the following repeat unit. It is made from two different monomers. [Figure 22.1] Which pair of monomers could be used to make this po...
Compound X contains two functional groups. [Figure 23.1] Which reagent will react with only one of the functional groups?
Ethanol can be converted into ethene in a single reaction. Ethanol can be converted into bromoethane in a single reaction. Under standard laborator...
Diols in which both hydroxy groups are bonded to the same carbon atom can spontaneously eliminate a molecule of water to produce a carbonyl compoun...
Which alcohol will give a yellow precipitate when warmed with alkaline aqueous iodine?
How many structural isomers are there of molecular formula C₅H₁₀O that give a red precipitate with Fehling's solution?
Which statement about the use of alkane fuels in internal combustion engines is correct?
Compound Z is shown. [Figure 29.1] What is produced in good yield when compound Z is treated with an excess of sodium carbonate solution at room te...
The infra-red spectrum shown was obtained from compound G. [Figure 30.1] What could be compound G?
The symbol for a phosphorus ion is ¹⁵³³P³⁻. The symbol for a potassium ion is ¹⁹³⁷K⁺. What do these two ions have in common? 1 the same number of e...
The repeat unit of a polymer is shown. [Figure 32.1] Which types of intermolecular forces exist in the solid polymer? 1 temporary dipole – induced ...
The diagram illustrates the enthalpy changes of a set of reactions. [Figure 33.1] Which statements are correct? 1 The enthalpy change for the trans...
Which statements about a reaction that has reached dynamic equilibrium are correct? 1 The rate of the forward reaction equals the rate of the rever...
Group 2 elements and their compounds show trends in their physical and chemical properties. Barium is above radium in Group 2 of the Periodic Table...
Which statements are correct? 1 The empirical formula of silicon(IV) oxide is SiO₂. 2 The molecular formula of phosphorus(V) oxide is P₂O₅. 3 Silic...
Which reagents could be used, under suitable conditions, to oxidise CH₃CH₂CH₂OH to CH₃CH₂CHO? 1 acidified potassium manganate(VII) 2 acidified pota...
Which free radicals can be generated during a free-radical substitution reaction between chlorine and ethane? 1 CH₃• 2 CH₂ClCH₂• 3 CH₃CCl₂•
Which substances have molecular formula C₄H₈O? 1 [Diagram 1] 2 [Diagram 2] 3 [Diagram 3]
Which reactions produce pentanoic acid? 1 CH₃CH₂CH₂CH(OH)CH₃ + H⁺/MnO₄⁻(aq) 2 CH₃OCO(CH₂)₃CH₃ + HCl(aq) 3 CH₃(CH₂)₃CN + H₂SO₄(aq)
The graph shows the first ionisation energies of some of the elements in Group 2. [Figure 1.1]
Phosphorus, sulfur and chlorine can all react with oxygen to form oxides.
The reducing agent LiAlH4 can be synthesised by reacting aluminium chloride with lithium hydride, LiH.
Iodine is used in many inorganic and organic reactions.
Atoms contain the subatomic particles electrons, protons and neutrons. Protons and electrons were discovered by observations of their behaviours in...
The Period 3 elements, Na to S, all react with oxygen to form oxides.
PCl5, PCl3 and NCl3 are halides of Group 15 elements.
Some reactions of compound G are shown. [Figure 4_G_scheme]
In this experiment you will determine the value of x in the formula of hydrated sodium thiosulfate, Na2S2O3•xH2O, where x is an integer. You will f...
When a solution containing thiosulfate ions, S2O32-, is acidified the following reaction occurs. S2O32-(aq) + 2H+(aq) → S(s) + SO2(g) + H₂O(l) Th...
Nitrogen monoxide, NO, reacts with oxygen to form nitrogen dioxide, NO2. 2NO(g) + O2(g) ⇋ 2NO2(g) The rate equation for the forward reaction is sho...
(a) The lattice energies of three ionic compounds are given. compound lattice energy/kJ mol-¹ LiF(s) -1022 CaO(s) -3513 SrO(s) -3310
A solution is made by dissolving CuSO4•5H2O in an excess of aqueous ammonia. This solution contains the copper complex [Cu(NH3)4]2+. The solution ...
(a) When 1.0 mol dm⁻³ Na2S2O3(aq) is added to a solution containing Ag+(aq) ions, a linear complex, P, is formed. S2O32- ions are present in P as m...
Phenol, C6H5OH, is a weak acid.
Benzene, C6H6, can be obtained from crude oil.
The proton NMR spectrum of compound E in the solvent CDCl3 is shown. The molecular formula of compound E is C9H10O2. [Figure of proton NMR spectrum...
(a) The table shows three pairs of monomers that are capable of polymerisation. Complete the table by identifying each type of polymerisation. [T...
The rate of the reaction H2(g) + I2(g) ⇌ 2HI(g) is studied.
(a) The energy cycle shown can be used, along with suitable data, to calculate the enthalpy change of hydration of Ca²⁺(g). Each arrow indicates a ...
(a) Ethanoic acid, CH3CO₂H and trichloroethanoic acid, CCl3CO₂H, are both carboxylic acids. Ethanoic acid can be used to make ethanamide, CH3CONH2.
The equation representing the standard electrode potential, E°, for the reduction of MnO₄⁻(aq) to Mn²⁺(aq) in acid solution is given. MnO₄⁻(aq) + 8...
Water and octan-1-ol form two layers when mixed. Ethanamide is more soluble in water than it is in octan-1-ol. When 1.00g of ethanamide is added to...
A solution is made by dissolving CuSO₄•5H₂O in an excess of aqueous ammonia. This solution contains the copper complex [Cu(NH₃)₄]²⁺.