Cambridge Past Paper Questions
Browse 23,045questions from 25 years of O-Level & A-Level exams. Click any question to practice.
Some polluting gases are removed from car exhaust fumes using a catalytic converter. Platinum or palladium can be used as the catalyst. The reactio...
Which statements about ceramics are correct? 1 Ceramics are good electrical conductors. 2 Ceramics are strong materials. 3 Ceramics have high melti...
Which types of bonding are present in ammonium carbonate, (NH₄)₂CO₃? 1 ionic 2 covalent 3 co-ordinate (dative covalent)
The diagram shows the structure of cholesterol. [Figure 37.1] Which statements about cholesterol are correct? 1 The molecule contains a secondary a...
The compounds listed are reacted with hydrogen cyanide. Which compounds produce a molecule containing a chiral centre? 1 butanal 2 butanone 3 penta...
Carboxylic acids can be prepared from alcohols, nitriles or esters. Which statements are correct? 1 Both primary and secondary alcohols can be oxid...
Nitrogen, N2, is the most abundant gas in the Earth's atmosphere and is very unreactive.
The elements in Group 17 of the Periodic Table are called the halogens. They form stable compounds with both metals and non-metals. The table gives...
Several ores of copper contain both copper(II) carbonate and copper(II) hydroxide. This combination is called basic copper(II) carbonate. You will ...
It is possible that ores containing basic copper(II) carbonate also contain water of crystallisation. The formula of these ores would be written as...
The following table lists the solubilities of the hydroxides and carbonates of some of the Group 2 elements, M, at 25 °C. solubility/mol dm⁻³ eleme...
Methyl 2-cyanoprop-2-enoate, W, is the major component of Super Glue, a rapid-setting adhesive. As the adhesive sets, the monomer W polymerises. [F...
The names of many drugs used in medicine often include parts of the names of the functional groups their molecules contain.
Ethanedioyl dichloride, ClCOCOCl, is a useful reagent in organic synthesis. It can be made from compound A in one step. [Figure 7.1] Ethanedioyl di...
The reaction between hydrogen peroxide, H2O2(aq), and iodide ions, I-(aq), takes place in acidic conditions. H2O2(aq) + 2I-(aq) + 2H+(aq) → I₂(aq) ...
A student was given a sample of an unknown Group 2 chloride. The student dissolved 3.172g of the unknown Group 2 chloride in distilled water in a b...
What number of protons, neutrons and electrons are present in the ion 54Fe3+?
For which hydrocarbon are the molecular and empirical formulae the same?
Which molecule does not have any 90° or 180° bond angles?
The following data are needed for this question. NaHCO3(s) + HCl(aq) → NaCl(aq) + H2O(l) + CO2(g) ΔH = -38.97 kJ mol-1 Na2CO3(s) + 2HCl(aq) → 2N...
In the redox reaction shown, how do the oxidation states of vanadium and sulfur change? VO2+ + SO2 → V3+ + SO42-
The equation for the reaction between silver chloride and aqueous ammonia is shown. AgCl(s) + 2NH3(aq) ⇋ [Ag(NH3)2]+(aq) + Cl-(aq) What are the uni...
Sodium azide, NaN3, decomposes as shown. 2NaN3 → 2Na + 3N2 Which volume of nitrogen, measured at room temperature and pressure, will be produced by...
A stable ion N5+ has been produced by research chemists. Which structure is most likely to show the electron arrangement of this ion?
1.8 g of water, heated to 227 °C in a sealed container, turns to steam with a pressure of 200 kPa. What is the approximate volume of the container?
When the equation is correctly balanced, what is the value of c? aC2H4 + bH2O + cH+ + 2MnO4- → dC2H6O2 + eMn2+
The main stage in the Contact process is an equilibrium reaction. 2SO2 + O2 ⇌ 2SO3 Which row describes the effect of the named condition on the equ...
X and Y are oxides of different Period 3 elements. If one mole of X is added to water, the solution formed is neutralised by exactly one mole of Y....
Compound Z is insoluble in water but soluble at low pH. What could be compound Z?
Hot aqueous sodium hydroxide reacts with chlorine. 6NaOH(aq) + 3Cl2(g) → 5NaCl(aq) + NaClO3(aq) + 3H2O(l) Which statement is correct?
Solid ammonium nitrate is put into a test-tube and solution X is added to it. The resulting mixture is warmed and the gas given off is tested with ...
Sodium, magnesium and aluminium are three elements in Period 3 of the Periodic Table. Each element forms an oxide. Which row is correct?
A student investigates calcium nitrate crystals by heating them in the apparatus shown. A colourless gas leaves the apparatus at Y. A flame is held...
How does concentrated sulfuric acid behave when it reacts with sodium chloride?
Which statement about nitrogen or its compounds is correct?
Which pair of compounds are functional group isomers of each other?
Which row identifies a suitable starting material and reagent that can be used to produce butanenitrile?
The diagram shows the structure of ethanedioic acid. [Figure 22.1] Ethanedioic acid reacts with ethanol in the presence of a few drops of concentra...
The infrared spectrum shown was obtained from a compound J. [Figure 23.1] Which statement about J is correct?
A section of a polymer chain is shown. [Figure 24.1] What is the correct monomer?
An excess of dry HBr is warmed with compound Y. [Figure 26.1] What is the major product of the reaction?
Which reaction would produce propanoic acid as one of its products?
Compound X is treated with an excess of lithium aluminium hydride. The reaction is allowed to go to completion. [Figure 28.1] What is the structure...
What is the skeletal formula of the compound formed when CH3CH=CHCH2OH is heated, under reflux, with K2Cr2O7/H+?
The diagram shows the structure of compound Q. [Figure 30.1] Two of the rings, X and Y, contain a C=C bond. Which row is correct?
Carbon and nitrogen are adjacent in the Periodic Table. Which properties do they both have? 1 There is an empty 2p orbital in each atom of the elem...
The strong hydrogen bonding present in liquid water causes an increase in which properties? 1 viscosity 2 boiling point 3 surface tension