Question 1

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)?

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. 
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 2

What functional group is present in the following compound?

Accepted Answer

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

Question 3

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)?

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. 
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 4

Draw all isomers of C5H10O that are ketones.

Accepted Answer

Question 5

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

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 
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 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)?

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. 
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 7

Which of these compounds is a secondary alkyl chloride?

Accepted Answer

A) CH3CH2CH2CH2CH2Cl 
B)    
C)    
D) (CH3)2CHCHClCH3 
E) Two of these choices. 
A) CH3CH2CH2CH2CH2Cl 
B)    
C)    
D) (CH3)2CHCHClCH3 
E) Two of these choices.

Question 8

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

Accepted Answer

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

Question 9

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 10

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 11

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

Question 12

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

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

Question 13

Which compound would have the highest boiling point?

Accepted Answer

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

Question 14

Which compound is an aldehyde?

Accepted Answer

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

Question 15

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

Accepted Answer

Question 16

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 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

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)?

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. 
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 19

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

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. 
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 20

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. 
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.

Exam 2: Families of Carbon

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)?

What functional group is present in the following compound?

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)?

Draw all isomers of C5H10O that are ketones.

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

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)?

Which of these compounds is a secondary alkyl chloride?

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

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

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

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

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

Which compound would have the highest boiling point?

Which compound is an aldehyde?

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

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.

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 ___.

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)?

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

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

The Basics

Acids and Bases

Nomenclature and Conformations of Alkanes and Cycloalkanes

Stereochemistry

Nucleophilic Reactions

Alkenes and Alkynes I

Alkenes and Alkynes II

Nuclear Magnetic Resonance and Mass Spectrometry

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Reactions at the Α Carbon of Carbonyl Compounds

Condensation and Conjugate Addition Reactions of Carbonyl Compounds

Amines

Transition Metal Complexes

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

Draw all isomers of C₅H₁₀O that are ketones.

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