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Which of the following compounds will have a base peak at m/z = 43?


A) CH3CH2CH2CH2CH2CH3
B) (CH3CH2) 2CHCH3
C) (CH3) 3CCH2CH3
D) (CH3) 2CHCH(CH3) 2
E) none of these

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Which one of the following compounds is consistent with the following IR spectrum? Which one of the following compounds is consistent with the following IR spectrum? SDBS: National Institute of Advanced Industrial Science and Technology A) I B) II C) III D) IV E) V SDBS: National Institute of Advanced Industrial Science and Technology Which one of the following compounds is consistent with the following IR spectrum? SDBS: National Institute of Advanced Industrial Science and Technology A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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Which of the following compounds will show an absorption at 2250 cm-1? Which of the following compounds will show an absorption at 2250 cm<sup>-1</sup>? A) I B) II C) III D) IV E) V Which of the following compounds will show an absorption at 2250 cm<sup>-1</sup>? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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Which of the following alkene groups will produce the stronger signal? Explain why. Which of the following alkene groups will produce the stronger signal? Explain why.

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Compound II.
The C=C in compou...

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Which of the following electromagnetic radiation has the highest energy?


A) UV
B) X-ray
C) IR
D) microwave
E) visible

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Which of the following compounds will show two sharp absorptions, one at 3300 cm-1 and one at 2150 cm-1? Which of the following compounds will show two sharp absorptions, one at 3300 cm<sup>-1</sup> and one at 2150 cm<sup>-1</sup>? A) I B) II C) III D) IV E) none of these


A) I
B) II
C) III
D) IV
E) none of these

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Which one of the following compounds is consistent with the mass spectrum below? Which one of the following compounds is consistent with the mass spectrum below? SDBS: National Institute of Advanced Industrial Science and Technology A) CH<sub>3</sub>CH<sub>2</sub>CH(CH<sub>3</sub>) <sub>2</sub> B) CH<sub>3</sub>CHOHCH<sub>2</sub>CH<sub>3</sub> C) CH<sub>3</sub>CH<sub>2</sub>OCH<sub>2</sub>CH<sub>3</sub> D) CH<sub>3</sub>CH<sub>2</sub>NHCH<sub>2</sub>CH<sub>3</sub> E) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>CH<sub>3</sub> SDBS: National Institute of Advanced Industrial Science and Technology


A) CH3CH2CH(CH3) 2
B) CH3CHOHCH2CH3
C) CH3CH2OCH2CH3
D) CH3CH2NHCH2CH3
E) CH3CH2CH2CH3

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Which one of the following compounds will have the lowest wavenumber for the carbonyl absorption? Which one of the following compounds will have the lowest wavenumber for the carbonyl absorption? A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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For the following pair of compounds the expected stretching absorption of the C=O bond is 1685 cm-1 and 1655 cm-1 respectively. Explain using both words and structural drawings. For the following pair of compounds the expected stretching absorption of the C=O bond is 1685 cm<sup>-1 </sup>and 1655 cm<sup>-1</sup> respectively. Explain using both words and structural drawings.

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Both compounds I and II have conjugated ...

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Which of the following compounds will produce a prominent (M-15) peak in the mass spectrum?


A) 2-methylheptane
B) 1-heptanol
C) heptanamine
D) 1-chloroheptane
E) none of these

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Which of the following compounds will produce a prominent (M-18) peak in the mass spectrum?


A) 2-methylheptane
B) 1-heptanol
C) heptanamine
D) heptanal
E) none of these

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Which of the following electromagnetic radiation has the longest wavelength?


A) UV
B) X-ray
C) IR
D) microwave
E) visible

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Compounds containing chlorine or bromine usually show a strong _____ peak.


A) molecular ion
B) base
C) M+1
D) M+2
E) all of these

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Which of the following compounds will have odd m/z value for the molecular ion? Which of the following compounds will have odd m/z value for the molecular ion? A) I B) II C) III D) IV E) all of them


A) I
B) II
C) III
D) IV
E) all of them

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How will you distinguish between the following compounds using high-resolution mass spectrometry? How will you distinguish between the following compounds using high-resolution mass spectrometry?

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Compound I: m/z at 9...

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Which one of the following compounds is consistent with the following IR spectrum? Which one of the following compounds is consistent with the following IR spectrum? SDBS: National Institute of Advanced Industrial Science and Technology A) I B) II C) III D) IV E) V SDBS: National Institute of Advanced Industrial Science and Technology Which one of the following compounds is consistent with the following IR spectrum? SDBS: National Institute of Advanced Industrial Science and Technology A) I B) II C) III D) IV E) V


A) I
B) II
C) III
D) IV
E) V

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Which of the following compounds have the same degree of unsaturation? Which of the following compounds have the same degree of unsaturation? A) I and II B) I and III C) III and IV D) II and III E) none of these


A) I and II
B) I and III
C) III and IV
D) II and III
E) none of these

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Which of the following is expected to be the base peak in the mass spectrum of pentanal? Which of the following is expected to be the base peak in the mass spectrum of pentanal? A) 29 B) 41 C) 44 D) 58 E) 86


A) 29
B) 41
C) 44
D) 58
E) 86

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Which one of the following compounds is consistent with the mass spectrum below? Which one of the following compounds is consistent with the mass spectrum below? SDBS: A) (CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>) <sub>2</sub>CH B) CH<sub>3</sub>CH<sub>2</sub>CHOHCH<sub>2</sub>CH<sub>2</sub>CH<sub>3</sub> C) (CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>) <sub>2</sub>O D) (CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>) <sub>2</sub>NH E) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>CH<sub>3</sub> SDBS:


A) (CH3CH2CH2) 2CH
B) CH3CH2CHOHCH2CH2CH3
C) (CH3CH2CH2) 2O
D) (CH3CH2CH2) 2NH
E) CH3CH2CH2CH3

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The C-O absorption in carboxylic acids appears around 1250 cm-1. The C-O absorption in an alcohol appears around 1050 cm-1. Explain why. The C-O absorption in carboxylic acids appears around 1250 cm<sup>-1</sup>. The C-O absorption in an alcohol appears around 1050 cm<sup>-1</sup>. Explain why.

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The C-O bond in a carboxylic a...

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