Question 1

The retention time in gas chromatography is the time it takes for a compound to pass through the chromatography column.

A column is packed with a stationary phase that is polar.

Which of the following will have the longest retention time in the column?

  A  

hexane

  B  

hex-1-ene


  C  

pentane

  D  

pentan-1-ol

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Question 2

The type of radiation used in NMR spectroscopy is

  A  

infrared

  B  

microwave

  C  

radio waves

  D  

ultraviolet

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Question 3

In the high resolution proton NMR spectrum of propan-1-ol, CH3CH2CH2OH, there are

  A  

one singlet, two triplets and one sextet

  B  

one singlet, two doublets and one triplet

  C  

one singlet, two triplets and one quartet

  D  

three triplets and one quartet

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Question 4

The high resolution proton NMR spectrum of ethyl ethanoate, CH3COOCH2CH3 , contains

  A  

two triplets and one doublet

  B  

one triplet, one doublet and one singlet

  C  

one quartet, one triplet, and one singlet

  D  

one quartet and two triplets

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Question 5

The diagram below shows a gas chromatogram.

Which statement about the gas chromatogram is correct?

  A  

the mixture consisted of at least 5 different substances

  B  

substance 5 came out of the column first

  C  

substance 1 had the greatest affinity for the stationary phase

  D  

substance 5 had the greatest affinity for the mobile phase

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Question 6

What describes a substance with a high retention time in gas-liquid chromatography?

  A  

high volatility

  B  

high solubility in the stationary phase


  C  

high affinity for the mobile phase


  D  

non-polar molecules

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Question 7

Which statement about gas-liquid chromatography is correct?

  A  

the column consists of a low boiling liquid on a porous support

  B  

the compound with the longest retention time comes out first

  C  

the emerging compounds can be detected by mass spectrometry

  D  

the sample does not need a carrier gas

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Question 8

A compound produces the 13C NMR spectrum below.

Which compound could have produced this spectrum?

  A  

propane

  B  

2-methylbutane

  C  

2-methylpropan-1-ol

  D  

2-methylpropan-2-ol

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Question 9

What is the number of peaks in the 1H NMR spectrum of HOOCCH2CHOHCH2COOH?

  A  

3

  B  

4

  C  

5

  D  

6

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Question 10

Which compound is used as a standard for NMR chemical shift measurements?

  A  

Si(CH3)4

  B  

CDCl3


  C  

D2O

  D  

CCl4

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Question 11

How many peaks are there in the 13C NMR spectrum of 1,4-dimethylbenzene?


  A  

8

  B  

4

  C  

3

  D  

2

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Question 12

Which amine has only three peaks in its proton NMR spectrum?

  A  

methylamine

  B  

trimethylamine

  C  

diethylamine

  D  

propylamine

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Question 13

Which statement does not support the suggestion that an unknown organic compound is

  A  

its 1H NMR spectrum has 3 peaks with an integration ratio of 2:3:3

  B  

its 13C NMR spectrum has 3 peaks

  C  

its infrared spectrum has an absorption at 1735 cm-1

  D  

it has 36.36% by mass of oxygen and 9.09% by mass of hydrogen

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