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.
FA 7 and FA 8 are solutions containing a total of three cations and two anions. Two of the cations and both of the anions are listed in the Qualita...
Iodine is found naturally in compounds in many different oxidation states.
Silicon is the second most abundant element by mass in the Earth's crust.
Titanium is a transition element in Period 4. It is commonly found as TiO2 in minerals.
Compounds F and J are shown in Fig. 4.1. [Figure 4.1 showing structures of F and J]
2-Chloropropanoic acid, CH3CHCICOOH, is used in many chemical syntheses.
Lidocaine is used as an anaesthetic. A synthesis of lidocaine is shown in Fig. 6.1. [Figure 6.1 showing synthesis of Lidocaine from W and X via Y]
A student has a sample of copper(II) sulfate crystals, CuSO₄•xH₂O. The student wants to show that the value of x is 5. The student uses the follow...
The conductivity of an ionic solution can be determined by passing an electric current through the solution and measuring the conductivity using a ...
Four equations representing reactions of nitrogen or one of its compounds are given. Which equation represents a disproportionation reaction?
The diagram shows the Boltzmann distribution for one mole of a gas. The gas takes part in a reaction with an activation energy, Ea. [Figure 2.1: Bo...
A student carries out four experiments to investigate the rate of reaction between 3.0 g of calcium carbonate and hydrochloric acid. CaCO3(s) + 2HC...
The table shows the partial pressures in an equilibrium mixture formed by the Haber process. 3H2(g) + N2(g) ⇌ 2NH3(g) [Table with columns "substanc...
A reversible reaction is shown. 2NOCl(g) ⇌ 2NO(g) + Cl2(g) ∆H = +77.0 kJ mol⁻¹ Which change in conditions will move the position of equilibrium to ...
The ore psilomelane may be considered to have the general formula Ba(Mnˣ⁺)(Mnʸ⁺)₈O₁₆(OH)₄. In this general formula, x+ and y+ are the two different...
Silicon reacts with a mixture of calcium oxide and magnesium oxide at 1200 °C. 2MgO + 2CaO + Si → 2Mg + Ca2SiO4 Which statement about this reaction...
In which species is there a lone pair of electrons?
Under which conditions will nitrogen behave most like an ideal gas? [Table with columns "temperature", "pressure"]
The equation for a chemical reaction is shown. All substances are in their standard states. XeF6 + 3H2O → XeO3 + 6HF Which statement describes the ...
Molten aluminium chloride has a simple molecular structure. Each molecule consists of two aluminium atoms and six chlorine atoms. Which statement i...
Which atom contains four times as many neutrons as the ⁷₃Li atom?
Which statement about the first ionisation energies of magnesium and neon is correct?
In a sample of pure water, what is the maximum number of hydrogen bonds that one molecule of water can be involved in?
Hydrated cobalt(II) sulfate loses water when heated to give anhydrous cobalt(II) sulfate. All the water of crystallisation is lost to the atmospher...
The table shows bond energies for some diatomic molecules. Deuterium, D, is an isotope of hydrogen. [Table with columns "bond", "energy /kJ mol⁻¹" ...
Two procedures are described. 1 Sulfur is burned in an excess of oxygen and then NO is added to the product mixture. 2 Sulfur is burned in an exces...
Powder P is a mixture containing two of AgCl, AgBr or AgI. P is shaken with dilute aqueous ammonia. A yellow solid, Q, remains. The mixture is filt...
Two Period 3 elements, X and Y, burn separately in oxygen to form solid oxides. The oxide of X is insoluble in water. The oxide of Y dissolves in w...
Which row describes the structure and bonding of SiO2 and SiCl4? [Table with columns "SiO2 structure", "SiO2 bonding", "SiCl4 structure", "SiCl4 bo...
A sample containing 0.010 mol of anhydrous calcium nitrate is heated strongly until it fully decomposes. All the gas produced is collected and its ...
V and Z are both elements in Period 3 of the Periodic Table. Each element forms one stable ion that does not contain another element. The atomic ra...
In Group 2 of the Periodic Table, the properties of the elements and their compounds show regular change down the group. Which property shows a dec...
Four properties of beryllium, Be, or a beryllium compound are listed. Which property is different from the property of magnesium or the equivalent ...
Which two formulae correctly represent a pair of structural isomers?
Which reagents and conditions would result in the formation of butanenitrile, CH3CH2CH2CN?
Compound X, C7H13Br, reacts with hot alcoholic NaOH to produce two compounds, Y and Z. On reaction with Br2, Y gives a product, C7H12Br2, which exi...
When illudin S is heated under reflux with an excess of acidified potassium dichromate(VI), compound M is formed. [Figure 28.1: Reaction scheme sho...
Cyclohexene, C6H10, is a hydrocarbon with a six-membered ring of carbon atoms. It has several structural isomers that are straight-chain alkenes. T...
Exhaust gases from an internal combustion engine are made less harmful by passing them through a catalytic converter. A number of reactions take pl...
Which compound reacts most rapidly with aqueous silver nitrate by an SN1 mechanism?
Tartaric acid, HOOCCH(OH)CH(OH)COOH, is found in many plants. A sample of tartaric acid reacts with an excess of LiAlH4 to form the organic product...
Citric acid can be converted into tricarballylic acid in two stages. An intermediate, Q, is formed. [Figure 33.1: Reaction scheme showing citric ac...
Structural and stereoisomerism should be considered when answering this question. P has molecular formula C5H10O. P produces an orange precipitate ...
Two isomeric alcohols, W and X, have molecular formula C4H9OH. W is oxidised to carbonyl compound Y which gives a red precipitate with Fehling's so...
The ester ethyl butanoate can be hydrolysed using an excess of dilute sodium hydroxide solution. Which substance is a product of this reaction?
An aqueous solution contains 4.00 g of a carboxylic acid, Q. When this solution reacts with an excess of magnesium, 380 cm³ of gas is produced, mea...
The infrared spectrum of an organic compound is shown. [Figure 38.1: Infrared spectrum showing transmittance (%) vs wavenumber (cm⁻¹). A table of c...
Cyclohexa-1,4-diene is treated with a solution of bromine in tetrachloromethane in the dark. [Figure 39.1: Structure of cyclohexa-1,4-diene.] Which...
2-methylbut-2-ene is reacted with hot, concentrated, acidified potassium manganate(VII) solution. What are the products of this reaction?
The Pauling electronegativity values of elements can be used to predict the chemical properties of compounds. Use the information in Table 1.1 to a...