Cambridge Past Paper Questions
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Zinc reacts with hydrochloric acid according to the following equation. Zn + 2HCl → ZnCl2 + H2 Which statements are correct? 1 A 3.27 g sample of z...
The melting point of chlorine is lower than the melting point of iodine. Which statements help to explain this difference? 1 Iodine has more electr...
Aqueous iron(II) sulfate can take part in redox reactions. 6FeSO4 + 7H2SO4 + Na2Cr2O7 → 3Fe2(SO4)3 + Cr2(SO4)3 + Na2SO4 + 7H2O Which redox changes ...
The equation represents an equilibrium. 4NH3(g) + 5O2(g) ⇋ 4NO(g) + 6H2O(g) ΔH = –900 kJ mol⁻¹ What would increase the concentration of NO at equil...
A sample containing x mol of Al2Cl6 is dissolved in water to give solution W. In order to precipitate all of the aluminium as its hydroxide, y mol ...
Which statements concerning calcium hydroxide are correct? 1 It is less soluble in water than strontium hydroxide. 2 When it is added to water an a...
Which bromopropenes would react with cold bromine in the dark to form a product containing a chiral carbon atom? 1 CHBr=CHCH3 2 CH2=CHCH2Br 3 CH2=C...
Halogenoalkanes can undergo reaction with hydroxide ions. RBr + OH⁻ → ROH + Br⁻ The reaction of some halogenoalkanes proceeds by the SN1 mechanism....
Which statements about 2-methylbutan-1-ol are correct? 1 It can give HCl(g) on reaction with PCl5. 2 It can be oxidised to give an aldehyde. 3 It d...
The compound cis-hex-3-enal is responsible for the characteristic smell of cut grass. [Figure of cis-hex-3-enal structure] cis-hex-3-enal Which rea...
Iron pyrite, FeS2, has a yellow colour that makes it look like gold metal. The compound contains the ions Fe2+ and S22-.
Trihalomethanes are organic molecules in which three of the hydrogen atoms of methane are replaced by halogen atoms, for example CHCl3.
The structure of glycolic acid is shown. [Figure 4.0 - Structure of glycolic acid: H-C(H)(OH)-COOH] OH glycolic acid
The model of the nuclear atom was first proposed by Ernest Rutherford. He developed this model on the basis of results obtained from an experiment ...
The table gives some data for elements in the third period and some of their compounds. element Na Mg Al Si P ...
The diagram shows a reaction sequence starting from ethanal. [Figure showing reaction sequence from ethanal to P, Q, R, S, W, Z, T and 2-aminopropane]
The structure of glycolic acid is shown. [Figure showing the structure of glycolic acid, HO-CH2-COOH]. glycolic acid
In this experiment you will determine the percentage purity of a sample of impure anhydrous sodium carbonate. You will use two different methods to...
Qualitative Analysis Where reagents are selected for use in a test, the full name or correct formula of the element or compound must be given. At...
2 In this experiment you will determine the enthalpy change, ΔH, for the reaction between aqueous copper(II) sulfate and zinc. The zinc is in exces...
Qualitative Analysis Where reagents are selected for use in a test, the full name or correct formula of the element or compound must be given. At e...
An aldehyde, an alkane and a carboxylic acid, all of similar volatility, are mixed together. The mixture is then analysed in a gas chromatograph. T...
Ethanedioate ions, C2O4²⁻, are bidentate ligands. Cr³⁺(aq) and C2O4²⁻(aq) ions form the complex ion [Cr(C2O4)2(H2O)2]⁻. The solubility of calcium e...
The reaction scheme shows some reactions of [Cu(H2O)6]²⁺. [Figure showing reaction scheme: [Cu(H2O)6]²⁺ reacts with NaOH(aq) to form precipitate A ...
Entropy is a measure of the disorder of a system. The enthalpy change of solution, ΔH°sol, of the Group 2 sulfates becomes more endothermic down th...
Polyhydroxyamide is a fire-resistant polyamide which is formed from the two monomers, F and G. [Structure of F: HO₂C-C₆H₄-CO₂H (benzene-1,4-dicarbo...
The isoelectric point is the pH at which an amino acid exists as a zwitterion. The isoelectric point of valine is 6.0 and of lysine is 9.8. A mixtu...
Chlorobenzene and phenol both show a lack of reactivity towards reactants that cause the breaking of the C–X bond (X = Cl or OH). A student suggest...
Entropy is a measure of the disorder of a system. Assume the entropy, S, for H₂O is zero at 0 K. The equation for a reaction that produces methanol...
Answer all the questions in the spaces provided. (a) An alkene, a carboxylic acid and a ketone, all of similar volatility, are mixed together. The...
(a) The reaction scheme shows some reactions of [Co(H2O)6]2+. [Figure 3.0]
2-hydroxypropanoic acid can be synthesised in four steps from ethanoic acid. [Figure 6.0]
(a) Polyurethanes are polymers made by the reaction of a diisocyanate with a diol as shown. R¹ and R² are hydrocarbon groups. [Figure 7.0] Lycra® ...
(a) Chloramine, NH2Cl, can be used in the treatment of drinking water to kill bacteria. Excess chloramine in water is destroyed using UV light. The...
(a) Use information from the Data Booklet to draw the structure of the dipeptide glu-cys. The isoelectric point is the pH at which an amino acid e...
Answer all the questions in the spaces provided. (a) An aldehyde, an alkane and a carboxylic acid, all of similar volatility, are mixed together. T...
(a) Ethanedioate ions, C2O42-, are bidentate ligands. Explain what is meant by the term ligand.
(a) Complete the table to show the total number of unpaired electrons in the 3d and 4s orbitals of each isolated gaseous atom. number of unpaired e...
(a) The enthalpy change of solution, ΔHsol∘, of the Group 2 sulfates becomes more endothermic down the group. State and explain the trend in the so...
(a) Polyhydroxyamide is a fire-resistant polyamide which is formed from the two monomers, F and G. [Figure: Structure of monomer F, HO₂C-(C₆H₄)-CO₂...
(a) Use the Data Booklet to draw the structure of the dipeptide val-lys. The peptide bond should be shown displayed.
(a) Chlorobenzene and phenol both show a lack of reactivity towards reactants that cause the breaking of the C–X bond (X = Cl or OH). Explain why.
8 Entropy is a measure of the disorder of a system.
The Finkelstein reaction is a nucleophilic substitution reaction in which a halogen atom in a halogenoalkane is replaced by another halogen atom. T...
The solubility product, Ksp, of a sparingly soluble salt can be determined by measuring the cell potential of a cell known as a concentration cell....
A sample of waste water contains calcium ions, copper(II) ions and lead(II) ions. You are to plan an experimental procedure to separate the metal i...