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Which of the following statements best describes the meaning of the following species: [CH3CH2CH3] ∙ + ?


A) It is the molecular ion of propane.
B) It is the parent ion of propane.
C) It is the radical cation of propane.
D) The m/z value is 44.
E) all of the above

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Which of the following functional groups will exhibit no IR absorption at 1630 - 1780 cm-1 or at 3200 - 3550 cm-1?


A) an alcohol
B) an amide
C) a ketone
D) an aldehyde
E) an ether

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Which of the following structures will give a base peak of 43 in mass spectrometry?


A) Which of the following structures will give a base peak of 43 in mass spectrometry? A) B) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>CH<sub>3</sub> C) D) E) none of the above
B) CH3CH2CH2CH2CH2CH3
C) Which of the following structures will give a base peak of 43 in mass spectrometry? A) B) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>CH<sub>3</sub> C) D) E) none of the above
D) Which of the following structures will give a base peak of 43 in mass spectrometry? A) B) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>CH<sub>3</sub> C) D) E) none of the above
E) none of the above

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Give the m/z ratio that corresponds to the molecular ion in the mass spectrum of 2-pentanone.


A) 28
B) 43
C) 58
D) 71
E) 86

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Which region of the electromagnetic spectrum, IR or UV, contains photons of the higher energy?

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When cyclopentanol is treated with chromic acid, the alcohol is oxidized to cyclopentanone. Which m/z peak is expected to be the base peak of cyclopentanone?


A) 55
B) 43
C) 29
D) 84
E) 85

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What m/z value would you predict for the most stable fragment peak in the mass spectrum of 4-ethylheptane?


A) 128
B) 127
C) 113
D) 99
E) 85

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