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7. Which compound has a 'H NMR spectrum consisting of one quartet, one triplet, and one singlet? (1 point) A) 2-chloro-4-methylpentane B) 3-chloro-2-methylpentane 3-chloro-3-methylpentane D) 1-chloro-2,2-dimethylbutane 8. How could you use ¹H NMR spectroscopy to distinguish between the following two compounds? (1 point) A) I has 3 signals and II has 2 signals B) has 4 signals and II has 3 signals C) I has 5 signals and II has 3 signals D) I has 3 signals and II has 4 signals y 9. How many signals would you expect to find in the ¹3C NMR spectrum of the following compound? (1 point) (A) 6 CH3 B) 7 C) 8 D) 9 11 10. Which compound matches the following spectroscopic data? (1 point) Infrared spectrum: 1720 cm¹ (intense) ¹H NMR spectrum: 1.1 8 (doublet, 6H), 2.1 8 (singlet, 3H), 2.7 8 (septet, 1H) 13C NMR spectrum: 15 6, 22 8, 45 8, 210 8 A) pentanal B) pent-2-en-1-ol C) 2-pentanone D) 3-methyl-2-butanone