How to Identify Compounds

Practice Questions

Organic Chemistry › How to Identify Compounds

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1

What is the (desired) chemical method through which molecules are fragmented when analyzed through mass spectrometry?

2

Which spectroscopic technique would best be able to distinguish between the constitutional isomers of ?

3

An alcohol group in a compound would result in a broad dip around what part of the infrared (IR) spectrum?

4

How many hydrogen peaks appear in the H-NMR spectrum of 3-pentanone?

5

Q2

How many unique peaks would one expect to see on an 1H-NMR reading of the compound shown above?

6

Which of the following is a component of the retention factor value in thin layer chromatography?

7

According to HNMR spectroscopy, which of the following molecules would result in a peak at 9.5ppm?

8

When an alkane is put through mass spectrometry and shows a parent peak at m/z = 100, what is the chemical formula of that alkane?

9

What is the "fingerprint" region of the infrared spectrum?

10

Which of these molecules is 3,4-dichlorobutanoic acid?

6

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