Infrared Spectroscopy · CAPE Chemistry Unit 2

37 past-paper questions on Infrared Spectroscopy, part of Analytical Methods and Separation Techniques, from every CAPE Chemistry Unit 2 paper on Quelpr.

1. 5(a)(i)2 marks· CAPE Chemistry Unit 2 · 2009 · Paper 2State TWO principles upon which IR spectroscopy is based.
2. 5(a)(ii)2 marks· CAPE Chemistry Unit 2 · 2009 · Paper 2State the TWO categories of molecular vibrations exhibited by molecules.
3. 5(a)(iii)2 marks· CAPE Chemistry Unit 2 · 2009 · Paper 2Outline the steps in the preparation of a solid compound for examination in an IR spectrometer.
4. 5(b)(i)3 marks· CAPE Chemistry Unit 2 · 2009 · Paper 2Use the data booklet to identify the bonds represented by peaks A, B, and C in Figure 4.
5. 5(b)(ii)1 mark· CAPE Chemistry Unit 2 · 2009 · Paper 2Suggest the structure of molecule Y.
6. Q251 mark · multiple choice· CAPE Chemistry Unit 2 · 2012 · Paper 1Which of the following pairs will NOT absorb infrared radiation? I. \text{H}_2 and \text{Cl}_2 II. \text{NH}_3 and \text{HBr} III. \text{CH}_4 and \text{Br}_2
7. Q241 mark · multiple choice· CAPE Chemistry Unit 2 · 2013 · Paper 1Item 24 refers to the diagram below which represents the structure of a water molecule. Which of the following vibrations may be exhibited by the molecule?
8. Q271 mark · multiple choice· CAPE Chemistry Unit 2 · 2013 · Paper 1Which of the following compounds do NOT absorb infrared radiation? I. \text{H}_2\text{O} and \text{HI} II. \text{H}_2 and \text{Cl}_2 III. \text{N}_2 and \text{Br}_2
9. 2(a)2 marks· CAPE Chemistry Unit 2 · 2013 · Paper 2State two molecular characteristics required for a molecule to be suitable for analysis by infrared (IR) spectroscopy.
10. 2(b)2 marks· CAPE Chemistry Unit 2 · 2013 · Paper 2Give two examples of practical applications of IR spectroscopy.
11. 2(c)(i)a)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Identify Compound A from its IR spectrum shown in Figure 2.
12. 2(c)(i)b)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Justify your identification of Compound A by indicating which absorption band on the spectrum was used and specifying the functional group responsible.
13. 2(c)(ii)a)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Identify Compound B from its IR spectrum shown in Figure 3.
14. 2(c)(ii)b)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Justify your identification of Compound B by indicating which absorption band on the spectrum was used and specifying the functional group responsible.
15. 2(c)(iii)a)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Identify Compound C from its IR spectrum shown in Figure 4.
16. 2(c)(iii)b)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Justify your identification of Compound C by indicating which absorption band on the spectrum was used and specifying the functional group responsible.
17. 2(d)(i)4 marks· CAPE Chemistry Unit 2 · 2013 · Paper 2Describe four steps involved in preparing and analysing a solid sample using IR spectroscopy.
18. 2(d)(ii)1 mark· CAPE Chemistry Unit 2 · 2013 · Paper 2Explain why the sample plates used in IR spectroscopy are made of NaCl.
19. Q231 mark · multiple choice· CAPE Chemistry Unit 2 · 2014 · Paper 1An unknown organic compound with molecular mass of 44\text{ g} is analysed using infrared. The bonds are found at 1700\text{ cm}^{-1} and 2800\text{ cm}^{-1}. The compound is MOST likely
20. Q231 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1An 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
21. Q251 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1Which 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
22. Q261 mark · multiple choice· CAPE Chemistry Unit 2 · 2016 · Paper 1Infrared spectroscopy is widely used to monitor atmospheric pollutants. Which of the following atmospheric pollutants is NOT usually monitored by infrared spectroscopy?
23. 2(a)3 marks· CAPE Chemistry Unit 2 · 2016 · Paper 2Explain the origin of infrared (IR) absorption by compounds.
24. 2(b)2 marks· CAPE Chemistry Unit 2 · 2016 · Paper 2State the properties of compounds which absorb IR radiation.
25. 2(c)(i)2 marks· CAPE Chemistry Unit 2 · 2016 · Paper 2Identify the groups responsible for the above absorptions.
26. 2(d)4 marks· CAPE Chemistry Unit 2 · 2016 · Paper 2Describe the steps taken in the preparation of a solid sample for IR analysis.
27. 2(e)1 mark· CAPE Chemistry Unit 2 · 2016 · Paper 2State ONE limitation of IR spectroscopy.
28. Q231 mark · multiple choice· CAPE Chemistry Unit 2 · 2017 · Paper 1In the infrared spectrum of an organic compound, a strong band is observed at 3000\text{ cm}^{-1}. The MOST likely explanation is that
29. Q291 mark · multiple choice· CAPE Chemistry Unit 2 · 2017 · Paper 1Which of the following bonds would show the STRONGEST absorption in IR spectroscopic analysis?
30. 2(d)(i)3 marks· Chemistry · Unit 2 Q2 2(d)(i)Identify the compound and provide justification for Figure 3.
31. 2(d)(ii)2 marks· Chemistry · Unit 2 Q2 2(d)(ii)Identify the compound and provide justification for Figure 4.
32. 2(d)(iii)2 marks· Chemistry · Unit 2 Q2 2(d)(iii)Identify the compound and provide justification for Figure 5.
33. 2(e)(i)4 marks· Chemistry · Unit 2 Q2 2(e)(i)Describe FOUR steps to be taken by the student in preparing the sample for analysis.
34. 2(e)(ii)1 mark· Chemistry · Unit 2 Q2 2(e)(ii)Give ONE reason why the plates used for IR spectroscopy are made from NaCl.
35. 2(g)2 marks· Chemistry · Unit 2 Q2 2(g)Explain the principles of infrared spectroscopy.
36. 2(h)(i)2 marks· Chemistry · Unit 2 Q2 2(h)(i)Compound D exhibits characteristic absorption wave numbers 1695 cm^-1 and 1619 cm^-1 in the infrared spectrum. Indicate the functional groups responsible for these absorptions.
37. 2(h)(ii)2 marks· Chemistry · Unit 2 Q2 2(h)(ii)Indicate TWO types of vibrations that could be exhibited by Compound D.