CAPE Chemistry Unit 2 · 2016 · Paper 1

44 multiple-choice items from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. Q11 mark · multiple choiceCombustion analysis of 0.18 g of an organic compound produces 0.396 g of carbon dioxide and 0.216 g of water. The empirical formula of the compound, given that it contains carbon, hydrogen and oxygen only, is
2. Q21 mark · multiple choiceWhich of the following compounds show optical activity? I. \text{CH}_3\text{CH(OH) COOH} II. \text{HOCH=CHOH} III. \text{CH}_3\text{CH(Cl)CH}_3 IV. \text{HC(Br)I Cl}
3. Q31 mark · multiple choicePentane has the molecular formula \text{C}_5\text{H}_{12}. How many possible isomers does this compound have?
4. Q41 mark · multiple choiceWhich of the following compounds is hydrolyzed by water?
5. Q51 mark · multiple choiceWhich of the following statements about polyunsaturated oils (triglycerides) is FALSE?
6. Q61 mark · multiple choiceAn alcohol is treated with acidified \text{K}_2\text{Cr}_2\text{O}_7 and the resulting mixture gives a positive tri-iodoform test. Which of the following structures BEST represents the alcohol used?
7. Q71 mark · multiple choiceWhich of the following reagents can be used to convert Compound R to Compound Y?
8. Q81 mark · multiple choiceWhich of the following equations is correct for the reaction of 4-methyl phenol with ethanoyl chloride?
9. Q91 mark · multiple choiceThe correct sequence of the compounds, in order of DECREASING acid strength, is P: \text{CH}_3(\text{CH}_2)_4\text{CH}_2\text{OH} Q: \text{CH}_3(\text{CH}_2)_3\text{CH}_2\text{COOH} R:…
10. Q101 mark · multiple choiceWhich of the following compounds does NOT give a white precipitate when shaken with cold ethanolic silver nitrate?
11. Q111 mark · multiple choiceWhich of the following sets of pH values is LIKELY to be for the amines, X, Y and Z respectively? X: \text{CH}_2\text{Cl CH}_2\text{Cl NH}_2 Y: \text{CH}_3\text{ CH}_2\text{ NH}_2 Z:…
12. Q131 mark · multiple choicePhenol and benzoic acid can be distinguished by their reaction with
13. Q141 mark · multiple choiceWhich of the following statements is NOT true of addition polymerization?
14. Q151 mark · multiple choiceWhich of the following polymers have the repeat unit shown above? I. Amino acid II. Nylon III. Polyamide
15. Q161 mark · multiple choiceWhich of the following statements is NOT true about the detection limit of an instrument?
16. Q171 mark · multiple choiceThe concentration of an ammonia solution is determined by titrating 25.0\text{ cm}^3 against 0.2\text{ mol dm}^{-3} sulfuric acid to give an end point of 27.5\text{ cm}^3. The concentration of ammonia (in…
17. Q181 mark · multiple choiceFor which of the following processes is the apparatus NOT suitable?
18. Q191 mark · multiple choiceWhich of the following inaccuracies may be eliminated by calibrating a measuring instrument?
19. Q201 mark · multiple choiceIn an electronic transition in the UV/visible region of the spectrum, a wavelength of 450 nm is absorbed. Planck constant (h) = 6.63 \times 10^{-34}\text{ J s} Velocity of light $(c) = 3.00 \times 10^8\text{ m…
20. Q211 mark · multiple choiceWhich of the following sets of regions in the electromagnetic spectrum is in the correct order of INCREASING wavelength?
21. Q221 mark · multiple choiceWhich of the following types of electronic transitions would NOT produce absorption in the UV/VIS region of the spectrum?
22. Q231 mark · multiple choiceAn unknown organic compound with molecular mass of 44 g is analyzed using infrared radiation. The bonds are found at 1700\text{ cm}^{-1} and 2800\text{ cm}^{-1}. The compound is MOST likely
23. Q241 mark · multiple choiceWhich of the following analytical techniques is considered MOST specific for identification purposes?
24. Q251 mark · multiple choiceWhich of the following pairs of compounds do NOT absorb infrared radiation? I. \text{H}_2 and \text{Cl}_2 II. \text{NH}_3 and \text{HCl} III. \text{N}_2 and \text{Br}_2
25. Q261 mark · multiple choiceInfrared spectroscopy is widely used to monitor atmospheric pollutants. Which of the following atmospheric pollutants is NOT usually monitored by infrared spectroscopy?
26. Q271 mark · multiple choiceHow many carbon atoms has Compound R?
27. Q281 mark · multiple choiceIn the chromatographic experiment, the mobile phase used was tetrachloromethane. Which of the following statements are true? I. Component A is most soluble in the mobile phase. II. Component A is most soluble in the…
28. Q291 mark · multiple choiceWhich of the following diagrams shows the boiling point-composition curve for a minimum boiling point azeotrope for a mixture of A and B?
29. Q301 mark · multiple choiceWhich of the following features are advantages of steam distillation? I. It occurs under reduced pressure. II. The components do not decompose. III. It provides savings in fuel cost.
30. Q311 mark · multiple choiceThe extraction of aluminium is an electrolytic process where the electrolyte used is purified ore dissolved in cryolite, \text{Na}_3\text{AlF}_6. Which of the following descriptions is true for the use of cryolite?
31. Q321 mark · multiple choiceWhich of the following substances are the MAIN impurities in bauxite? I. Iron(III) oxide II. Calcium oxide III. Silicon(IV) oxide
32. Q331 mark · multiple choiceChlorofluorocarbons undergo homolytic fission by being exposed to ultraviolet light in the stratosphere. Which radical could result from \text{CH}_2\text{FCF}_2\text{Cl}?
33. Q341 mark · multiple choiceThe essential conditions for the Haber process are
34. Q351 mark · multiple choiceWhich of the following environmental problems could be caused by the incomplete combustion of ethanol in a car engine?
35. Q361 mark · multiple choiceWhich of the following products is NOT produced for commercial purposes by the electrolysis of concentrated brine?
36. Q371 mark · multiple choiceCompounds of sulfur such as sulfites are used as food additives because they
37. Q381 mark · multiple choiceChlorine is the active component for swimming pool disinfectants, although it is a poisonous gas. Which of the following salts is used as a safe chlorine source?
38. Q391 mark · multiple choiceWhich of the following chemicals are added to the final product water in the desalination post-treatment stage? I. Lime (\text{Ca(OH)}_2) II. Iron(III) chloride III. Sodium hypochlorite (\text{NaOCl})
39. Q401 mark · multiple choiceW would MOST likely be
40. Q411 mark · multiple choiceIn which layer of the atmosphere does ozone act as a pollutant?
41. Q421 mark · multiple choiceWhich of the following resources are normally associated with the formation of photochemical smog? I. Nitrogen oxides II. Sunlight III. Volatile organic resources
42. Q431 mark · multiple choiceWhich of the following compounds is NOT a primary pollutant?
43. Q441 mark · multiple choiceIt can be concluded from the graph that I. aldehydes and ozone are secondary pollutants II. hydrocarbons are secondary pollutants III. nitrogen monoxide is a primary pollutant
44. Q451 mark · multiple choiceWhich of the following substances is a MAJOR component of biomass?