CAPE Chemistry Unit 2 · May/June 2026 · Paper 2

35 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)(i)2 marksDescribe the term 'homologous series'.
2. 1(a)(ii)1 markState the name of a homologous series which only contains aliphatic hydrocarbons.
3. 1(a)(iii)1 markDraw the displayed structural formula of a three-carbon compound of the named homologous series in (a) (ii).
4. 1(a)(iv)1 markWrite the IUPAC name of the displayed structural formula in (a) (iii).
5. 1(b)(i)2 marksDistinguish between empirical formula and molecular formula.
6. 1(b)(ii)4 marksCalculate the empirical formula of Compound A.
7. 1(b)(iii)1 markIf the molecular mass of Compound A is 46 a.m.u, what is the molecular formula?
8. 1(c)(i)1 markState the name of the reagent C.
9. 1(c)(ii)1 markState the name of the primary amine, B.
10. 1(c)(iii)1 markDraw the displayed structural formula of primary amine, B.
11. 1(c)(iv)1 markState the characteristic physical property of primary amine, B which can be observed.
12. 1(c)(v)2 marksState the colour changes which would be observed if litmus is added to a solution of primary amine, B.
13. 1(d)3 marksUsing pKa values of 16, 4.8 and 0.6, complete Table 1 with the correct pKa value for EACH organic compound.
14. 1(e)(i)1 markState the characteristic physical property of the ethyl ethanoate.
15. 1(e)(ii)2 marksState TWO differences between acid hydrolysis and alkaline hydrolysis of ethyl ethanoate.
16. 1(e)(iii)4 marksWrite balanced chemical equations for EACH of the following. Acid hydrolysis of ethyl ethanoate. Alkaline hydrolysis of ethyl ethanoate.
17. 1(e)(iv)2 marksOutline how biodiesel (for diesel engines) is made by the process of transesterification.
18. 2(a)(i)2 marksCalculate the mean volume.
19. 2(a)(ii)2 marksCalculate the standard deviation in the mean volume given. S = √(Σ(x-x̄)² / (n-1))
20. 2(a)(iii)5 marksOutline the FIVE steps to be taken to determine the accuracy and uncertainty in dispensing 15.0 mL of water from a burette.
21. 2(a)(iv)2 marksGiven the volumes delivered from A, B and C, state which glassware should give EACH of the following. The most accurate volume. The least accurate volume.
22. 2(b)4 marksUse the information above to determine the chemical formula of the hydrate of CuSO4, that is, the x in CuSO4•xH2O.
23. 2(c)(i)2 marksWrite the equation for the reaction between the sulfate of a Group 1 element (M) and barium chloride.
24. 2(c)(ii)5 markscalculate the mass of sulfate in the Group 1 sulfate. determine the % weight of sulfate in the Group 1 sulfate.
25. 2(d)4 marksGive TWO examples in which gravimetric analysis (by precipitation) can be employed in quality control. Indicate the product(s) obtained as the precipitate.
26. 2(e)4 marksList the FOUR main steps involved in mass spectrometry.
27. 3(a)(i)5 marksOutline the principles involved in EACH of the following processes. Fractional distillation. Cracking.
28. 3(a)(ii)2 marksOctane, C8H18, can be cracked to form ethane and one other hydrocarbon. Write an equation to show this reaction.
29. 3(a)(iii)4 marksReforming is a technique used to produce cycloalkanes from straight chain alkanes. Using an equation, show how cyclomethylhexane can be formed by reforming.
30. 3(a)(iv)3 marksIncomplete combustion of petroleum products releases carbon monoxide, unburnt hydrocarbons and carbon particles into the environment. Describe how any ONE principle of Green Chemistry can be used to minimize this form…
31. 3(b)(i)4 marksUsing appropriate equations, show how starch can be converted to ethanol.
32. 3(b)(ii)2 marksIt is important to have safety requirements in an ethanol plant. State TWO properties of ethanol that are considered when making the ethanol plant safe.
33. 3(b)(iii)2 marksEthanol produced from sugar cane residues is used instead of petrol as a fuel in cars. State ONE advantage and ONE disadvantage of this practice. Advantage. Disadvantage.
34. 3(b)(iv)3 marksExplain how the overconsumption of ethanol could have a negative economic impact on a society.
35. 3(c)5 marksOutline an experimental procedure that can be used to determine if Brand A white rum has a higher ethanol content than Brand B white rum.