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AQA A-Level Chemistry: Structure Determination Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. Which is a way to separate solid sugar from a solution of sugar water?

Question 2 2. You performed paper chromatography on some marker ink and found that one of the pigments had a retention factor of 0.25. The total distance the solvent traveled was 8.0 cm. How far did the pigment travel?

Question 3 3. Homogeneous mixtures are also called

Question 4 4. Which of the following is the most heterogeneous mixture?

Question 5 5. Alcohol and water are best separated from one another by:

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Question 6 6. The mass spectrum of 2-hexanone has its largest peak at m/z = 43 rather than at m/z = 100 (M+ ). Why is this?

Question 7 7. An unknown hydrocarbon has peaks at m/z = 29 and 43, and an M+ peak at m/z = 58 in the mass spectrum. What is the chemical formula for the hydrocarbon?

Question 8 8. A molecule has no peaks near 3000 cm-1 in its IR spectrum. What we can say about this molecule?

Question 9 9. Mass spectrometry probes the structure of a molecule by looking at _____, whereas IR spectroscopy investigates molecular structure by looking at _____.

Question 10 10. Which of the following molecules will have a C=O peak at the lowest frequency (energy) in the IR spectrum?

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Question 11 11. How many peaks or signals would you expect to observe in the 1H-NMR spectrum of ethyl acetate?

Question 12 12. What type of solvent must an NMR sample be run in?

Question 13 13. In NMR, hydrogen atoms on neighboring carbons cause the target signal to _____.

Question 14 14. How many peaks or signals would you expect to observe in the C-13 NMR spectrum of ethyl acetate?

Question 15 15. If you were to take ALL of the integration values from the 1H-NMR spectrum of ethyl acetate and add them together, what would be the TOTAL number of hydrogens you would get?

AQA A-Level Chemistry: Structure Determination Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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