Cambridge Past Paper Questions
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Three bottles of colourless liquids labelled F, G and H contain separate pure samples of the compounds ethanal, propanal or propanone but not neces...
Diamond and graphite are both crystalline solids made from carbon atoms. Graphite conducts electricity. Diamond does not conduct electricity.
A sample of iron contains three different isotopes and has a relative atomic mass, Ar, of 55.8.
(a) C3H6 reacts with HBr(g) in an addition reaction. (i) Define addition reaction. (ii) Complete Fig. 3.1 to show the mechanism for the addition re...
(a) Propanoic acid, CH3CH2COOH, reacts with reducing agent Q to produce propan-1-ol, CH3CH2CH2OH. (i) Suggest the formula of reducing agent Q. (ii)...
The structure of vitamin C is shown in Fig. 5.1. [Figure 5.1]
The chemical properties of an element are related to the electronic configuration of its atoms.
The chemical properties of oxides are related to the chemical bonding present in these compounds.
Different hydrocarbon mixtures produced from fractional distillation of crude oil have different uses.
The reaction between Na₂S₂O₃(aq) and HCl(aq) is monitored at constant temperature. Na₂S₂O₃ + 2HCl → 2NaCl + SO₂ + S + H₂O Fig. 4.1 shows how the co...
W is a colourless liquid. [Fig. 5.1]
HOCl reacts with CH₂=CH₂ to produce HOCH₂CH₂Cl in an electrophilic addition reaction.
You will determine the percentage purity of another sample of calcium carbonate, CaCO3, by titration. The experiment involves three steps. step 1 A...
Acids donate H⁺ in aqueous solution. The number of moles of H⁺ donated per mole of acid is the proticity of the acid. For example, sulfuric acid is...
You will determine the enthalpy change for the reaction of aqueous citric acid with aqueous sodium hydroxide to form aqueous sodium citrate. The pr...
Solutions FB 7 and FB 8 each contain one cation and one anion. All of the ions are listed in the Qualitative analysis notes.
Hydrogen peroxide, H2O2, reacts rapidly with acidified potassium manganate(VII), KMnO4. 5H2O2(aq) + 2MnO4¯(aq) + 6H+(aq) → 502(g) + 8H2O(l) + 2Mn2+...
You will now determine the concentration of a solution of hydrogen peroxide by a different method. Hydrogen peroxide decomposes slowly into water a...
Both calcium carbonate, CaCO3, and barium carbonate, BaCO3, decompose when heated to form the metal oxide and a gas.
Three experiments are carried out to investigate the reaction of nitrogen oxide, NO, with chlorine. 2NO + Cl2 → 2NOCI The rate equation for this re...
Table 4.1 gives the enthalpy changes of hydration, ∆Hhyd, of three ions, F⁻, K⁺ and Ca²⁺. Table 4.1 ion ∆Hhyd / kJ mol⁻¹ F⁻ -506 K⁺ -322 Ca²⁺ -1650
Copper is a transition element.
A hydrocarbon is known to be either compound D or compound E. [Figure 7.1] D CH2CH3 CH2CH3 E CH2CH3 CH2CH3 Fig. 7.1
Bromine reacts with methylbenzene in the dark in the presence of a suitable catalyst to form HBr and compound L, C7H7Br. L is one of three isomers ...
Phenylamine, C6H5NH2, and propylamine, CH3CH2CH2NH2, can be produced by different reduction reactions.
Propanoic acid, methanoic acid and ethanedioic acid are all weak acids.
When cobalt(II) sulfate, CoSO4, is dissolved in distilled water, solution A is formed. The reaction scheme in Fig. 2.1 shows some reactions of solu...
Compound A is analysed by carbon-13 NMR and proton (1H) NMR spectroscopy. [Figure 8.1] (structure of A)
The structures of the amino acids serine and lysine are shown in Fig. 9.1. [Figure 9.1]
(a) Chromium(III) hydroxide, Cr(OH)3, is only slightly soluble in water. The value of the solubility product, Ksp, of Cr(OH)3 is 1.0 × 10–33 at 298 K.
Table 4.1 gives the enthalpy changes of hydration, ΔHhyd, of three ions, F¯, K+ and Ca2+. Table 4.1 ion ΔHhyd/kJ mol-1 F- -506 K+ -322 Ca2+ -1650
(a) Iron forms complex ions with the monodentate ligand, CN¯.
A hydrocarbon is known to be either compound D or compound E. [Figure 7.1] (a) Give the systematic name of E.
(a) Phenylamine, C6H5NH2, and propylamine, CH3CH2CH2NH2, can be produced by different reduction reactions.
Grignard reagents have the general formula RMgX, where R is a hydrocarbon group and X is a halogen. The Grignard reagent C6H5MgBr is used as an int...
An experiment is carried out to determine the rate constant, k, for the hydrolysis of ethyl ethanoate, CH3COOC2H5, using a hydrochloric acid, HCl(a...
Activated carbon is a form of carbon with the ability to adsorb solutes from solutions. The adsorption of ethanedioic acid molecules, (COOH)2, from...
The enthalpy change of combustion, ∆Hᶜ, of butane, C₄H₁₀, can be determined using the apparatus shown in Fig. 2.1. [Figure 2.1] The following steps...
0.200 mol of a hydrocarbon undergo complete combustion to give 35.2 g of carbon dioxide and 14.4 g of water as the only products. What is the molec...
Use of the Data Booklet is relevant to this question. The graph represents the variation of a property of the Group II elements. [Figure 2.1] What ...
The antidote molecule shown can help to prevent liver damage if someone takes too many paracetamol tablets. [Figure 3.1] What is the order of decre...
The first stage in the industrial production of nitric acid from ammonia can be represented by the following equation. 4NH3(g) + 5O2(g) ⇌ 4NO(g) + ...