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- 1. Multiple-choice30 seconds1 pt
Which of the following absorption peak or peaks would be most useful for identifying the compound diethylamine?
Medium stretch from 3500 to 3300 cm-1
Sharp peak at 1750 cm-1
Two medium peaks, one at 3300 cm-1 and 3400 cm-1
Very broad stretch from 3500 to 2500 cm-1
- 2. Multiple-choice30 seconds1 pt
On which factors the vibrational stretching frequency of diatomic molecule depend?
Force constant
Atomic population
Temperature
Magnetic field
- 3. Fill-in-the-Blank30 seconds1 pt
A reaction is second order with respect to the reactant. How is the rate of reaction affected if the concentration of the reaction is "doubled"?
- 4. Multiple-choice30 seconds1 pt
Based on the absorption spectrum, what is the likely name of the compound in the image?
butanoic acid
Pentanol
diethylamine
aniline
- 5. Multiple-choice10 seconds1 pt
What is the relation between restoring force, f to the displacement q in Hooke’s law?
f = -kq
f = kq
f = kq2
f = -kq2
- 6. Multiple-choice1 minute1 pt
Listen the audio and answer the question.
Stretching frequencies appear mostly in the fingerprint region
Stretching frequencies are lower than corresponding bending frequencies.
Triple bonds have lower stretching frequencies than corresponding double bonds, which in turn have lower frequencies than single bonds.
Bonds to hydrogen have higher stretching frequencies than those to heavier atoms.
- 7. Poll5 secondsNA
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- 8. Open-ended1 minute1 pt
Give your opinion on this method of online quizzing?
- 9. Multiple-choice10 seconds1 pt
Formaldehyde is
CH3CHO
HCHO
C6H5CHO
NONE OF THESE
- 10. Multiple-choice10 seconds1 pt
Identify the compound
Toluene
Benzaldehyde
Benzoic Acid
None of these
