7. Which of the following bonds (circled) vibrates at the highest frequency ? a.

Question

7. Which of the following bonds (circled) vibrates at the highest frequency ? a.1 b. 2 C. 3 d. 4 8. Which of the foIIowing functional groups is likely to be present in a molecule that has peaks in the infrared spectrum at 1630-1820 cm^-1 (strong, broad), but does not have peaks at 3200-365O or 1000-1250 Cm^-1 a. alcohol b. aldehyde or ketone ether ester 9.Which of the following compounds gives an infrared spectrum with peaks in the range of 3200-3650 (strong, broad) and 1600-1640 cm^-1 (medium); but does not have peaks at 1630-1820 (strong)?

Explanation / Answer

7. a.1 (alkane C-H bond is more strength given peak at highest frequency)

8. b.aldhyde or ketone (due no peak at 3200-3650 or 1000-1250 its not ester)

9. c.3 (due 1600-1640 cm-1 peak it indicates double bond ,and 300-3650 indicates alchol )

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