QUESTION 1 UV-Vis spectroscopy is most useful for detecting aldehydes and ketone

Question

QUESTION 1

UV-Vis spectroscopy is most useful for detecting

aldehydes and ketones

unconjugated alkenes

conjugated alkenes

aliphatic acids and amines

1 points   

QUESTION 2

Mass spectroscopy results in the separation of fragments according to

atomic mass

mass-to-charge ratio

viscosity

absortion wavelength

1 points   

QUESTION 3

Calculate the frequency of light associated with wavelength, ? = 15 ?m. Remember ??=c, where c = 3.00 x 108m/s. ( 1 ?m = 1x10-6 m).

2.0 x 1013s-1

2.0 x 107s-1

5.0 x 10-4s-1

5.0 x 10-8s-1

1 points   

QUESTION 4

For UV light of wavelength 254 nm, calculate the frequency and the amount of energy absorbed by a single molecule when it absorbs a quantum of this light. (Remember ??=c, where c = 3.00 x 108m/s and E = h?, where h = 6.63 x 10-34 J

aldehydes and ketones

unconjugated alkenes

conjugated alkenes

aliphatic acids and amines

Explanation / Answer

1. C

2. B

3. A

4. D

5. B

6. B

7. A

8. D

9. B

10. C

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