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Multiple Choice
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1

A ketal is in equilibrium involving:
A)Two alcohol molecules and a ketone
B)Two alcohol molecules and an aldehyde
C)An alcohol and a ketone
D)An alcohol and an aldehyde
E)Three alcohols
2

The open and ring forms of glucose represents an equilibrium between:
A)An alcohol with an aldehyde and a hemiacetal
B)An alcohol with a ketone and a hemiketal
C)An acetal and an aldehyde with an alcohol
D)A ketal and a ketone with an alcohol
E)None of these
3

A common name for 5-nonanone is:
A)Nonyl ketone
B)Dibutyl ketone
C)Butyl pentyl ketone
D)Dipentyl ketone
E)Pentyl pentyl ketone
4

Which of these items is false?
A)A molecule of beta-carotene is converted into 2 molecules of vitamin A
B)Vitamin A is converted into 11-cis-retinal
C)11-cis-retinal is involved in light recognition
D)11-cis-retinal undergoes a cis/trans isomerization
E)None of the above
5

In a positive Benedict's test:
A)Copper ions are oxidized
B)Aldehydes are reduced
C)Cu1+ is precipitated as an oxide
D)A red precipitate becomes a blue solution
E)None of these
6

Which of the following will give a positive Benedict's test?
A)Pentane
B)1-Pentene
C)Pentanal
D)2-Pentanone
E)Pentanoic acid
7

(CH3CH2)2C(OCH3)2 is a(n):
A)Hemiacetal
B)Acetal
C)Hemiketal
D)Ketal
E)None of these
8

The molecule: <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072920033/80712/14b_number11.gif','popWin', 'width=161,height=178,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> is a(n)
A)Hemiacetal
B)Acetal
C)Hemiketal
D)Ketal
E)None of these
9

Will the compound in problem 14-21 give a positive Benedict's test?
A)Yes
B)No





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