Question 1

How many peaks would be observed for each of the circled protons in the compounds below?

Accepted Answer

A)  I = 6; II = 2; III = 3
B)  I = 7; II = 3; III = 3
C)  I = 7; II = 1; III = 3
D)  I = 7; II = 2; III = 3

Question 2

How many different kinds of 13C peaks will be seen? 13C peaks will be seen?   A) 2 B) 3 C) 4 D) 5" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  2
B)  3
C)  4
D)  5

Question 3

An unknown compound X has the molecular formula C7H13OBr.Compound X shows a strong peak in its IR spectrum at 1700 cm-1.The 1H NMR spectral data of compound X is given below.What is the structure of compound X? 7H13OBr.Compound X shows a strong peak in its IR spectrum at 1700 cm-1.The 1H NMR spectral data of compound X is given below.What is the structure of compound X?   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)  IV

Question 4

Compound X has a molecular formula C8H10 and gives the 1H NMR spectrum below.What is the structure of X? 8H10 and gives the 1H NMR spectrum below.What is the structure of X?   A) A B) B C) C D) D" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  A
B)  B
C)  C
D)  D

Question 5

How many different kinds of protons are present in each of the following molecules?

Accepted Answer

A)  I = 6; II = 3; III = 4
B)  I = 5; II = 3; III = 4
C)  I = 6; II = 4; III = 5
D)  I = 6; II = 4; III = 4

Question 6

How many unique protons are present in each of the following compounds?

Accepted Answer

A)  I = 6; II = 3; III = 6
B)  I = 5; II = 4; III = 6
C)  I = 6,II = 4,III = 4
D)  I = 6; II = 4; III = 6

Question 7

How could spectroscopy be used to distinguish between the following compounds? 1H NMR spectrum at 1.0 ppm. B) Compound B has a peak at 3200-3500 cm-1 in its IR spectrum. C) Compound A has a peak in its IR spectrum at 2900 cm-1. D) Compound A has a triplet in its 1H NMR spectrum at 1.0 ppm and compound B has a peak at 3200-3500 cm-1 in its IR spectrum." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  Compound A has a triplet in its 1H NMR spectrum at 1.0 ppm.
B)  Compound B has a peak at 3200-3500 cm-1 in its IR spectrum.
C)  Compound A has a peak in its IR spectrum at 2900 cm-1.
D)  Compound A has a triplet in its 1H NMR spectrum at 1.0 ppm and compound B has a peak at 3200-3500 cm-1 in its IR spectrum.

Question 8

Into how many peaks will each of the circled protons be split? (Assume complete resolution of all NMR peaks is possible)

Accepted Answer

A)  I = 3; II = 8; III = 1; IV = 4; V = 3
B)  I = 9; II = 8; III = 2; IV = 4; V = 4
C)  I = 4; II = 8; III = 2; IV = 4; V = 5
D)  I = 4; Ii = 7; III = 2; IV = 4; V = 3

Question 9

What region of the electromagnetic spectrum does nuclear magnet resonance spectroscopy use?

Accepted Answer

A)  Radio frequency
B)  Microwave frequency
C)  Infrared frequency
D)  Visible frequency
E)  Ultraviolet frequency

Question 10

Which of the following compounds would give rise to a 13C spectrum with 6 peaks? 13C spectrum with 6 peaks?   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)  IV

Question 11

What effect does increasing the operating frequency of a 1H NMR spectrum have on the magnitude of a coupling constant J in Hz?

Accepted Answer

A)  Magnitude of coupling constant J in Hz will also increase.
B)  Magnitude of coupling constant J in Hz will decrease.
C)  Magnitude of coupling constant J in Hz will remain the same.
D)  It is not possible to predict the change in the magnitude of coupling constant J in Hz.

Exam 32: Spectroscopy C: Nuclear Magnetic Resonance Spectroscopy

Compound X has a molecular formula C₈H₁₀ and gives the ¹H NMR spectrum below.What is the structure of X?

Correct Answer
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Which of the following compounds would give rise to a ¹³C spectrum with 6 peaks?

Correct Answer
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What effect does increasing the operating frequency of a ¹H NMR spectrum have on the magnitude of a coupling constant J in Hz?

Correct Answer
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An unknown compound X has the molecular formula C₇H₁₃OBr.Compound X shows a strong peak in its IR spectrum at 1700 cm^-1.The ¹H NMR spectral data of compound X is given below.What is the structure of compound X?

Correct Answer
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How many different kinds of protons are present in each of the following molecules?

Correct Answer
verified

How many unique protons are present in each of the following compounds?

Correct Answer
verified

Into how many peaks will each of the circled protons be split? (Assume complete resolution of all NMR peaks is possible)

Correct Answer
verified

How could spectroscopy be used to distinguish between the following compounds?

Correct Answer
verified

What region of the electromagnetic spectrum does nuclear magnet resonance spectroscopy use?

Correct Answer
verified

How many different kinds of ¹³C peaks will be seen?

Correct Answer
verified

How many peaks would be observed for each of the circled protons in the compounds below?

Correct Answer
verified

Exam 32: Spectroscopy C: Nuclear Magnetic Resonance Spectroscopy

Compound X has a molecular formula C8H10 and gives the 1H NMR spectrum below.What is the structure of X?

Correct AnswerverifiedShow Answer

Which of the following compounds would give rise to a 13C spectrum with 6 peaks?

Correct AnswerverifiedShow Answer

What effect does increasing the operating frequency of a 1H NMR spectrum have on the magnitude of a coupling constant J in Hz?

Correct AnswerverifiedShow Answer

An unknown compound X has the molecular formula C7H13OBr.Compound X shows a strong peak in its IR spectrum at 1700 cm-1.The 1H NMR spectral data of compound X is given below.What is the structure of compound X?

Correct AnswerverifiedShow Answer

How many different kinds of protons are present in each of the following molecules?

Correct AnswerverifiedShow Answer

How many unique protons are present in each of the following compounds?

Correct AnswerverifiedShow Answer

Into how many peaks will each of the circled protons be split? (Assume complete resolution of all NMR peaks is possible)

Correct AnswerverifiedShow Answer

How could spectroscopy be used to distinguish between the following compounds?

Correct AnswerverifiedShow Answer

What region of the electromagnetic spectrum does nuclear magnet resonance spectroscopy use?

Correct AnswerverifiedShow Answer

How many different kinds of 13C peaks will be seen?

Correct AnswerverifiedShow Answer

How many peaks would be observed for each of the circled protons in the compounds below?

Correct AnswerverifiedShow Answer

Compound X has a molecular formula C₈H₁₀ and gives the ¹H NMR spectrum below.What is the structure of X?

Correct Answer
verified

Which of the following compounds would give rise to a ¹³C spectrum with 6 peaks?

Correct Answer
verified

What effect does increasing the operating frequency of a ¹H NMR spectrum have on the magnitude of a coupling constant J in Hz?

Correct Answer
verified

An unknown compound X has the molecular formula C₇H₁₃OBr.Compound X shows a strong peak in its IR spectrum at 1700 cm^-1.The ¹H NMR spectral data of compound X is given below.What is the structure of compound X?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many different kinds of ¹³C peaks will be seen?

Correct Answer
verified

Correct Answer
verified