Question 1

Examine the following IR spectrum,for substance Q (C7H14O2).Which oxygen containing functional group is most likely present in Q?

Accepted Answer

Question 2

What functional group(s) is/are present in the following compound? o amine and 2o amine B) amide and 2o amine C) 2o amine and nitrile D) nitrile and 1o amine E) amide and nitrile" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  1o amine and 2o amine
B)  amide and 2o amine
C)  2o amine and nitrile
D)  nitrile and 1o amine
E)  amide and nitrile

Question 3

Carbon dioxide is non-polar,despite the fact that oxygen is much more electronegative than carbon.Briefly explain why,using relevant diagrams as appropriate to illustrate your answer.

Accepted Answer

The overall dipole moment of a polyatomi...

Question 4

Draw all isomers of C5H10O that are ketones.

Accepted Answer

Question 5

The six p electrons in benzene are ___ about the ring,which explains why all of the C-C bonds are the same length.

Accepted Answer

The answer of The six p electrons in benzene are...

Question 6

For the following reaction sequence (it is not necessary to understand the chemistry) what significant change(s) would be expected by IR (ignoring C-H absorptions) ? -1 would disappear and nothing new would appear. B) A peak around 1710 cm-1 would disappear and a new peak around 3300 cm-1 would appear. C) A peak around 1650 cm-1 would disappear and nothing new would appear. D) No change would be observed. E) None of these choices." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  A peak around 3300 cm-1 would disappear and nothing new would appear.
B)  A peak around 1710 cm-1 would disappear and a new peak around 3300 cm-1 would appear.
C)  A peak around 1650 cm-1 would disappear and nothing new would appear.
D)  No change would be observed.
E)  None of these choices.

Question 7

What functional group(s) is/are present in the following compound? o alcohol" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  ether and ketone
B)  carbonyl and ether
C)  carboxylic acid and ether
D)  ester
E)  1o alcohol

Question 8

What alkyl groups are attached to the benzene ring in the following example?

Accepted Answer

A)  ethyl,butyl
B)  ethyl,isobutyl
C)  propyl,sec-butyl
D)  propyl,butyl
E)  None of these choices.

Question 9

Which compound is an aldehyde?

Accepted Answer

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

Question 10

For the following reaction sequence (it is not necessary to understand the chemistry) what significant change(s) would be expected by IR (ignoring C-H absorptions) ? -1 would disappear and nothing new would appear. B) A new peak around 1710 cm-1 would appear and a peak around 3300 cm-1 would disappear. C) A peak around 2150 cm-1 would disappear and a new peak around 3300 cm-1 would appear. D) No change would be observed. E) None of these choices." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  A peak around 3300 cm-1 would disappear and nothing new would appear.
B)  A new peak around 1710 cm-1 would appear and a peak around 3300 cm-1 would disappear.
C)  A peak around 2150 cm-1 would disappear and a new peak around 3300 cm-1 would appear.
D)  No change would be observed.
E)  None of these choices.

Question 11

Which of these compounds is a secondary alkyl chloride?

Accepted Answer

A)  CH3CH2CH2CH2CH2Cl
B)   3CH2CH2CH2CH2Cl 
B)     
C)     
D)  (CH3) 2CHCHClCH3 
E)  Two of these choices." class="answers-bank-image d-inline" rel="preload" >
C)   3CH2CH2CH2CH2Cl 
B)     
C)     
D)  (CH3) 2CHCHClCH3 
E)  Two of these choices." class="answers-bank-image d-inline" rel="preload" >
D)  (CH3) 2CHCHClCH3
E)  Two of these choices.

Question 12

For the following reaction sequence (it is not necessary to understand the chemistry) what significant change(s) would be expected by IR (ignoring C-H absorptions) ? -1 would disappear. B) A peak around 1710 cm-1 would disappear and a new peak around 3300 cm-1 would appear. C) A peak around 2150 cm-1 would disappear and a new peak around 3300 cm-1 would appear. D) No change would be observed. E) None of these choices." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  A peak around 3300 cm-1 would disappear.
B)  A peak around 1710 cm-1 would disappear and a new peak around 3300 cm-1 would appear.
C)  A peak around 2150 cm-1 would disappear and a new peak around 3300 cm-1 would appear.
D)  No change would be observed.
E)  None of these choices.

Question 13

For the functional group(s) on the following molecule what characteristic IR absorption(s) would be expected (ignoring C-H absorptions) ? -1 B) a peak around 3300 cm-1 C) a peak around 1650 cm-1 D) a peak around 2250 cm-1 E) None of these choices." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  a peak around 1700 cm-1
B)  a peak around 3300 cm-1
C)  a peak around 1650 cm-1
D)  a peak around 2250 cm-1
E)  None of these choices.

Question 14

What functional group is present in the following compound? o alkyl bromide B) 2o amine C) nitrile D) 1o amine E) 3o amine" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  1o alkyl bromide
B)  2o amine
C)  nitrile
D)  1o amine
E)  3o amine

Question 15

The absorption band for the O-H stretch in the IR spectrum of an alcohol is sharp and narrow in the case of

Accepted Answer

A)  a Nujol mull of the alcohol.
B)  a concentrated solution of the alcohol.
C)  a gas phase spectrum of the alcohol.
D)  the spectrum of the neat liquid.
E)  None of these choices.

Question 16

Which compound would have the highest boiling point?

Accepted Answer

A)  CH3CH2CH2CH2CH2CH3
B)  CH3CH2OCH2CH2CH3
C)  CH3CH2CH2CH2CH2OH
D)  CH3CH2OCH(CH3) 2
E)  CH3OCH2CH2CH2CH3

Question 17

Organic compounds are classified into chemical families on the basis of similarities in chemical properties; these similarities are primarily due to the presence of characteristic arrangements of atoms known as ___.

Accepted Answer

The answer of Organic compounds are classified into chemical families...

Question 18

The higher the wave number in the infrared spectra,the greater the energy that is required to vibrate the bond.

Accepted Answer

A) True 
 B)False

Question 19

For the following reaction sequence (it is not necessary to understand the chemistry) what significant change(s) would be expected by IR (ignoring C-H absorptions) ? -1 would disappear. B) A peak around 1710 cm-1 would appear. C) A peak around 2150 cm-1 would disappear. D) No change would be observed. E) None of these choices." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  A peak around 1710 cm-1 would disappear.
B)  A peak around 1710 cm-1 would appear.
C)  A peak around 2150 cm-1 would disappear.
D)  No change would be observed.
E)  None of these choices.

Question 20

The following substance is expected to have the lowest solubility in which of the following solvent(s) ? 4 B) C2H5OH C) CHCl3 D) HOCH2CH2CH2CH2CH2CH2OH E) The given substance is likely to be quite soluble in all of the solvents described." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  CCl4
B)  C2H5OH
C)  CHCl3
D)  HOCH2CH2CH2CH2CH2CH2OH
E)  The given substance is likely to be quite soluble in all of the solvents described.

Exam 2: Families of Carbon

The absorption band for the O-H stretch in the IR spectrum of an alcohol is sharp and narrow in the case of

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Examine the following IR spectrum,for substance Q (C7H14O2).Which oxygen containing functional group is most likely present in Q?

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For the following reaction sequence (it is not necessary to understand the chemistry) what significant change(s) would be expected by IR (ignoring C-H absorptions) ?

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The higher the wave number in the infrared spectra,the greater the energy that is required to vibrate the bond.

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What functional group(s) is/are present in the following compound?

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Which of these compounds is a secondary alkyl chloride?

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Organic compounds are classified into chemical families on the basis of similarities in chemical properties; these similarities are primarily due to the presence of characteristic arrangements of atoms known as ___.

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Which compound would have the highest boiling point?

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For the following reaction sequence (it is not necessary to understand the chemistry) what significant change(s) would be expected by IR (ignoring C-H absorptions) ?

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Draw all isomers of C5H10O that are ketones.

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Which compound is an aldehyde?

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What functional group is present in the following compound?

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For the following reaction sequence (it is not necessary to understand the chemistry) what significant change(s) would be expected by IR (ignoring C-H absorptions) ?

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The following substance is expected to have the lowest solubility in which of the following solvent(s) ?

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The six p electrons in benzene are ___ about the ring,which explains why all of the C-C bonds are the same length.

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For the following reaction sequence (it is not necessary to understand the chemistry) what significant change(s) would be expected by IR (ignoring C-H absorptions) ?

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Carbon dioxide is non-polar,despite the fact that oxygen is much more electronegative than carbon.Briefly explain why,using relevant diagrams as appropriate to illustrate your answer.

Correct AnswerverifiedThe overall dipole moment of a polyatomi...View AnswerShow Answer

What functional group(s) is/are present in the following compound?

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For the functional group(s) on the following molecule what characteristic IR absorption(s) would be expected (ignoring C-H absorptions) ?

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What alkyl groups are attached to the benzene ring in the following example?

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Examine the following IR spectrum,for substance Q (C₇H₁₄O₂).Which oxygen containing functional group is most likely present in Q?

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Draw all isomers of C₅H₁₀O that are ketones.

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The overall dipole moment of a polyatomi...
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