Question 1

What is the hydrogen deficiency index for a compound with a molecular formula of C6H11N?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and D)
F) A) and C) B

Question 2

How many signals appear in the proton-decoupled 13C NMR spectrum of 1,2-dibromobenzene?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and C)
F) B) and C)

Question 3

Which C4H9Br compound(s)  gives a 13C NMR spectrum consisting of two signals? 4H9Br compound(s)  gives a 13C NMR spectrum consisting of two signals?   A)  only 1 B)  only 2 C)  only 2 and 3 D)  1, 2, 3 and 4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   only 1
B)   only 2
C)   only 2 and 3
D)   1, 2, 3 and 4E) None of the above
F) All of the above

Question 4

How many sets of equivalent protons are there in 3-methylhexane?

Accepted Answer

A)   2
B)   3
C)   6
D)   7E) C) and D)
F) A) and D)

Question 5

Which of the following is not true regarding 1H NMR spectroscopy?

Accepted Answer

A)   a "downfield" peak appears at a lower value of d
B)   on a 300 MHz instrument, a proton that adsorbs irradiation at a frequency 900 Hz higher than the adsorption of TMS appears at d 3 ppm.
C)   d for a particular proton is independent of the magnetic field strength of the instrument used.
D)   "deshielding" leads to peaks at higher values of dE) B) and D)
F) A) and C)

Question 6

How many signals appear in proton-decoupled 13C NMR spectrum of 3,4-dimethylhexane?

Accepted Answer

A)   3
B)   4
C)   5
D)   6E) A) and B)
F) A) and C)

Question 7

Which of the following combinations of peaks appears in the 1H NMR spectrum of 2,3-dimethylbutane?

Accepted Answer

A)   two doublets
B)   a doublet and a septet
C)   a singlet and two doublets
D)   a doublet and an octetE) A) and C)
F) A) and B) A

Question 8

What is the relative area of the six peaks in a sexet in an 1H NMR spectrum?

Accepted Answer

A)   1:2:3:3:2:1
B)   1:3:6:6:3:1
C)   1:5:10:10:5:1
D)   1:6:15:15:6:1E) B) and C)
F) C) and D)

Question 9

Which of the following compounds gives a 1H NMR spectrum consisting of only a singlet, triplet and quintet?

Accepted Answer

A)   CH3OCH2CH2CH2CH2OH
B)   CH3OCH2CH2OCH2CH3
C)   CH3OCH2CH2CH2OCH3
D)   CH3OCH2CH(CH3) OCH3E) B) and D)
F) B) and C)

Question 10

Which of the following compounds gives a 1H NMR spectrum consisting of two singlets and a 13C NMR consisting of consisting of three signals? 1H NMR spectrum consisting of two singlets and a 13C NMR consisting of consisting of three signals?   A)  only i B)  only iii C)  only ii and iii D)  only ii, iii and iv" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   only i
B)   only iii
C)   only ii and iii
D)   only ii, iii and ivE) All of the above
F) B) and C)

Question 11

What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of propane?

Accepted Answer

A)   singlet
B)   doublet
C)   triplet
D)   quartetE) None of the above
F) A) and B)

Question 12

Identify the compound (C8H10) that gives the following 1H NMR spectrum.

Accepted Answer

p-xylene (...

Question 13

Which of the protons in the following molecule appear furthest downfield in the 1H NMR spectrum? 1H NMR spectrum?   A)  i B)  ii C)  iii D)  iv" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   i
B)   ii
C)   iii
D)   ivE) C) and D)
F) A) and C)

Question 14

Which C4H9Br compound gives a doublet at approximately 3.3 ppm in the 1H NMR spectrum? 4H9Br compound gives a doublet at approximately 3.3 ppm in the 1H NMR spectrum?   A)  1 B)  2 C)  3 D)  4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and B)
F) All of the above

Question 15

Which of the following compounds have homotopic protons? 
1.propane
2.butane
3.2-methylpropane

Accepted Answer

A)   only 1
B)   only 2
C)   only 1 and 2
D)   1, 2 and 3E) All of the above
F) A) and B)

Question 16

How many signals appear in the proton-decoupled 13C NMR spectrum of the following compound? 13C NMR spectrum of the following compound?   A)  7 B)  8 C)  9 D)  11" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   7
B)   8
C)   9
D)   11E) None of the above
F) A) and D)

Question 17

What is the hydrogen deficiency index for a compound with a molecular formula of C10H16O2?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and D)
F) A) and B)

Question 18

How many signals appear in the proton-decoupled 13C NMR spectrum of 1,3-dibromobenzene?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) B) and C)
F) B) and D)

Question 19

Which C9H10O compound gives the following 1H NMR spectrum? 9H10O compound gives the following 1H NMR spectrum?   A)  1 B)  2 C)  3 D)  4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and D)
F) A) and B) A

Question 20

Which of the protons in the following molecule appear at the highest d-value in the 1H NMR spectrum? 1H NMR spectrum?   A)  i B)  ii C)  iii D)  iv" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   i
B)   ii
C)   iii
D)   ivE) A) and D)
F) All of the above

Exam 13: Nuclear Magnetic Resonance Spectroscopy

What is the hydrogen deficiency index for a compound with a molecular formula of C6H11N?

Correct AnswerverifiedB

How many signals appear in the proton-decoupled 13C NMR spectrum of 1,2-dibromobenzene?

Correct AnswerverifiedShow Answer

Which C4H9Br compound(s) gives a 13C NMR spectrum consisting of two signals?

Correct AnswerverifiedShow Answer

How many sets of equivalent protons are there in 3-methylhexane?

Correct AnswerverifiedShow Answer

Which of the following is not true regarding 1H NMR spectroscopy?

Correct AnswerverifiedShow Answer

How many signals appear in proton-decoupled 13C NMR spectrum of 3,4-dimethylhexane?

Correct AnswerverifiedShow Answer

Which of the following combinations of peaks appears in the 1H NMR spectrum of 2,3-dimethylbutane?

Correct AnswerverifiedA

What is the relative area of the six peaks in a sexet in an 1H NMR spectrum?

Correct AnswerverifiedShow Answer

Which of the following compounds gives a 1H NMR spectrum consisting of only a singlet, triplet and quintet?

Correct AnswerverifiedShow Answer

Which of the following compounds gives a 1H NMR spectrum consisting of two singlets and a 13C NMR consisting of consisting of three signals?

Correct AnswerverifiedShow Answer

What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of propane?

Correct AnswerverifiedShow Answer

Identify the compound (C8H10) that gives the following 1H NMR spectrum.

Correct Answerverifiedp-xylene (...View AnswerShow Answer

Which of the protons in the following molecule appear furthest downfield in the 1H NMR spectrum?

Correct AnswerverifiedShow Answer

Which C4H9Br compound gives a doublet at approximately 3.3 ppm in the 1H NMR spectrum?

Correct AnswerverifiedShow Answer

Which of the following compounds have homotopic protons? 1.propane 2.butane 3.2-methylpropane

Correct AnswerverifiedShow Answer

How many signals appear in the proton-decoupled 13C NMR spectrum of the following compound?

Correct AnswerverifiedShow Answer

What is the hydrogen deficiency index for a compound with a molecular formula of C10H16O2?

Correct AnswerverifiedShow Answer

How many signals appear in the proton-decoupled 13C NMR spectrum of 1,3-dibromobenzene?

Correct AnswerverifiedShow Answer

Which C9H10O compound gives the following 1H NMR spectrum?

Correct AnswerverifiedA

Which of the protons in the following molecule appear at the highest d-value in the 1H NMR spectrum?

Correct AnswerverifiedShow Answer

What is the hydrogen deficiency index for a compound with a molecular formula of C₆H₁₁N?

Correct Answer
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B

How many signals appear in the proton-decoupled ¹³C NMR spectrum of 1,2-dibromobenzene?

Correct Answer
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Which C₄H₉Br compound(s) gives a ¹³C NMR spectrum consisting of two signals?

Correct Answer
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Correct Answer
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Which of the following is not true regarding ¹H NMR spectroscopy?

Correct Answer
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How many signals appear in proton-decoupled ¹³C NMR spectrum of 3,4-dimethylhexane?

Correct Answer
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Which of the following combinations of peaks appears in the ¹H NMR spectrum of 2,3-dimethylbutane?

Correct Answer
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A

What is the relative area of the six peaks in a sexet in an ¹H NMR spectrum?

Correct Answer
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Which of the following compounds gives a ¹H NMR spectrum consisting of only a singlet, triplet and quintet?

Correct Answer
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Which of the following compounds gives a ¹H NMR spectrum consisting of two singlets and a ¹³C NMR consisting of consisting of three signals?

Correct Answer
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What is the splitting of the signal in the ¹H NMR spectrum for the methyl protons of propane?

Correct Answer
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Identify the compound (C₈H₁₀) that gives the following ¹H NMR spectrum.

Correct Answer
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p-xylene (...
View Answer

Which of the protons in the following molecule appear furthest downfield in the ¹H NMR spectrum?

Correct Answer
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Which C₄H₉Br compound gives a doublet at approximately 3.3 ppm in the ¹H NMR spectrum?

Correct Answer
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Correct Answer
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How many signals appear in the proton-decoupled ¹³C NMR spectrum of the following compound?

Correct Answer
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What is the hydrogen deficiency index for a compound with a molecular formula of C₁₀H₁₆O₂?

Correct Answer
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How many signals appear in the proton-decoupled ¹³C NMR spectrum of 1,3-dibromobenzene?

Correct Answer
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Which C₉H₁₀O compound gives the following ¹H NMR spectrum?

Correct Answer
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A

Which of the protons in the following molecule appear at the highest d-value in the ¹H NMR spectrum?

Correct Answer
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