Spectroscopy and chromatography multiple choice questions – A-Level Chemistry (Edexcel International)

1 of 21

CO and N₂ both have M_r values of 28.

What is the reason that CO and N₂ can be distinguished by high-resolution mass spectrometry?

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2 of 21

Y is an organic compound.

The accurate relative atomic masses, A_r, of the four elements that could make up Y are shown in the table.

Element	A_r_
H	1.0078
C	12.0000
N	14.0031
O	15.9949

Y gives a molecular ion peak at m/z = 100.0522 on its mass spectrum.

Which is the molecular formula of Y?

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3 of 21

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?

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4 of 21

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

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5 of 21

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

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6 of 21

The diagram below shows a gas chromatogram.

Diagram showing a gas chromatogram with peaks labeled 1 to 5, representing different compounds over time.

Which statement about the gas chromatogram is correct?

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7 of 21

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

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8 of 21

Which statement about gas-liquid chromatography is correct?

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9 of 21

A compound produces the ¹³C NMR spectrum below.

Carbon NMR spectrum showing peaks at different chemical shifts.

Which compound could have produced this spectrum?

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10 of 21

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

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11 of 21

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

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12 of 21

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

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13 of 21

Which amine has only threepeaks in its proton NMR spectrum?

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14 of 21

Which statement does notsupport the suggestion that an unknown organic compound is

Diagram showing the structure of an organic compound with the formula CH3COOCH2CH3.

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15 of 21

What is the ratio of the areas of the signals in the ¹H NMR spectrum of pentan-3-ol?

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16 of 21

What information can be deduced from the splitting pattern of ¹H NMR signals?

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What is the ratio of areas under each signal in the ¹H NMR spectrum of 2-methylbutane?

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18 of 21

What can be determined about a molecule from the number of signals in its ¹H NMR spectrum?

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19 of 21

A chromatogram of two amino acids, A and B, is shown.

The R_f value of amino acid A is...

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20 of 21

A chromatogram of two amino acids, A and B, is shown.

The R_f value of amino acid B is...

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21 of 21

A compound with the formula C₆H₁₄ gives a ¹³C NMR spectrum with four peaks.

Which compound gives this spectrum?

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Spectroscopy and Chromatography

Spectroscopy and Chromatography

Spectroscopy and Chromatography - exam practice

Spectroscopy and Chromatography

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Spectroscopy and Chromatography - exam practice

Spectroscopy and Chromatography

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