Question 1

Choose the INCORRECT statement.

Accepted Answer

A)  Latin prefixes provide information on the numbers of C atoms in a chain.
B)  An alkane group used as a side chain group is called an alkyl group.
C)  Di,tri,and tetra can be used to designate the number of side chain groups.
D)  Positional isomers differ in the position on the main chain of the side chain group.
E)  Functional groups are distinctive groupings of one or more atoms.F) C) and D)
G) A) and B)

Question 2

Which statements regarding chiral compounds are correct?
I."Chiral carbon" is synonymous with "asymmetric carbon."
II.The presence of one chiral carbon in a structure results in two possible enantiomers.
III.Two enantiomers can be interconverted without breaking any bonds.
IV.Two chiral molecules are mirror images of each other.
V.Two chiral molecules have significantly different chemical properties.

Accepted Answer

A)  II,III,and V
B)  I,II,and IV
C)  I,III,and IV
D)  II,IVand V
E)  III,and VF) A) and C)
G) C) and D)

Question 3

Find the answer that has correct both the two structures of cis-1-isopropyl-4-methylcyclohexane and their relative stability (stability is indicated with ">" meaning "more stable than") .

Accepted Answer

A)     meaning  more stable than ) . 
A)     
B)     
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >
B)     meaning  more stable than ) . 
A)     
B)     
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >
C)     meaning  more stable than ) . 
A)     
B)     
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >
D)     meaning  more stable than ) . 
A)     
B)     
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >E) C) and D)
F) None of the above

Question 4

What is the degree of unsaturation for the following compounds?

Accepted Answer

A)  For A the degree of unsaturation is 1,for B is 6 and for C is 5.
B)  For A the degree of unsaturation is 1,for B is 5 and for C is 6.
C)  For A the degree of unsaturation is 0,for B is 6 and for C is 5.
D)  For A the degree of unsaturation is 1,for B is 6 and for C is 4.
E)  For A the degree of unsaturation is 1,for B is 4 and for C is 5.F) B) and E)
G) B) and D)

Question 5

Choose the best configuration assignments for the three double bonds,labeled A,B and C,in the following compound:

Accepted Answer

A)  A is E,B is E,and C is E
B)  A is E,B is E,and C is Z
C)  A is Z,B is Z,and C is E
D)  A is E,B is Z,and C is E
E)  A is Z,B is E,and C is ZF) All of the above
G) A) and D)

Question 6

In alkene nomenclature "trans" stands for "on the same side" while "cis" means "across."

Accepted Answer

A) True 
 B)False

Question 7

Which of the following four molecules are aromatic?

Accepted Answer

A)  A,C,D
B)  A,B,D
C)  B,D
D)  A,D
E)  B,CF) B) and E)
G) All of the above

Question 8

Give the condensed structural formula for 2-methylpropanoic acid.

Accepted Answer

A)  (CH3) 2CHCOOH
B)  (CH3) 2CHCHO
C)  (CH3) 2CHCH2COOH
D)  (CH3) 2COOH
E)  CH3CH2COOHF) A) and E)
G) B) and C)

Question 9

You found an organic compound containing chiral carbon atom with the following four substituents: HC≡C-,Cl-,O=C- and H2C=CH-.What would be the correct order of their priorities?

Accepted Answer

A)  HC≡C- > O=C- > Cl- > H2C=CH-
B)  Cl- > HC≡C- > O=C- > H2C=CH-
C)  Cl- > O=C- > HC≡C- > H2C=CH-
D)  Cl- > O=C-> H2C=CH- > HC≡C-
E)  O=C- > Cl- > HC≡C- > H2C=CH-F) C) and D)
G) B) and C)

Question 10

Combustion of 493 mg of a hydrocarbon gave 1549 mg CO2 and 633.9 mg H2O.What is the molecular formula if the molecular weight is subsequently found to be 42?

Accepted Answer

A)  CO2 
B)  CH2 
C)  C6H12 
D)  C2H2O
E)  C3H6 F) C) and E)
G) None of the above

Question 11

Which of the following compounds is(are) Z configuration(s) ?

Accepted Answer

A)  I
B)  II
C)  III
D)  I + II
E)  I + II + IIIF) C) and E)
G) B) and E)

Question 12

Give the condensed structural formula for 3-bromopentane.

Accepted Answer

A)  CH3CH2CHBrCH2CH2CH3 
B)  CH3CHBrCH2CH2CH3 
C)  (CH3) 3CHBrCH2CH3 
D)  CH3CH2CHBrCH2CH3 
E)  CH3CH2CBr3CH2CH3 F) A) and C)
G) A) and E)

Question 13

Compounds I) to V) are all cyclic compounds.How many heterocyclic compounds are among them?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) D) and E)
G) A) and C)

Question 14

Which of the following compounds is(are) chiral?

Accepted Answer

A)  I
B)  II
C)  III
D)  I and II
E)  II and IIIF) A) and D)
G) B) and D)

Question 15

Calculate the degree of unsaturation for the molecule below:

Accepted Answer

A)  3
B)  5
C)  7
D)  9
E)  11F) C) and D)
G) A) and C)

Question 16

Give the name for CH3CH2CH2COCH2CH3.

Accepted Answer

A)  4-hexanone
B)  3-hexanone
C)  3-butanone
D)  3-hexanol
E)  4-hexanoic acidF) A) and D)
G) C) and E)

Question 17

Give the condensed structural formula for 3-methyl-3-hexene.

Accepted Answer

A)  CH3CH2CH(CH3) CH=CHCH3 
B)  CH3CH2C(CH3) 2CH=CHCH3 
C)  (CH3) 3CCH=CHCH3 
D)  CH3CH2C(CH3) =CHCH2CH3 
E)  (CH3) 6CCH2CH=CH2 F) B) and D)
G) A) and C)

Question 18

Which class of compounds is the least reactive?

Accepted Answer

A)  ethers
B)  alcohols
C)  ketones
D)  alkyl halides
E)  aldehydesF) B) and E)
G) D) and E)

Question 19

How many isomers are there for C5H12?

Accepted Answer

A)  3
B)  4
C)  5
D)  6E) A) and C)
F) B) and C)

Exam 26: Structures of Organic Compounds

In alkene nomenclature "trans" stands for "on the same side" while "cis" means "across."

Correct Answer
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Choose the best configuration assignments for the three double bonds,labeled A,B and C,in the following compound:

Correct Answer
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Correct Answer
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Which of the following compounds is(are) Z configuration(s) ?

Correct Answer
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Give the condensed structural formula for 3-methyl-3-hexene.

Correct Answer
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Calculate the degree of unsaturation for the molecule below:

Correct Answer
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How many isomers are there for C₅H₁₂?

Correct Answer
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Give the condensed structural formula for 2-methylpropanoic acid.

Correct Answer
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Compounds I) to V) are all cyclic compounds.How many heterocyclic compounds are among them?

Correct Answer
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What is the degree of unsaturation for the following compounds?

Correct Answer
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Choose the INCORRECT statement.

Correct Answer
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Give the name for CH₃CH₂CH₂COCH₂CH₃.

Correct Answer
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Combustion of 493 mg of a hydrocarbon gave 1549 mg CO₂ and 633.9 mg H₂O.What is the molecular formula if the molecular weight is subsequently found to be 42?

Correct Answer
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Which of the following four molecules are aromatic?

Correct Answer
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Which of the following compounds is(are) chiral?

Correct Answer
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Find the answer that has correct both the two structures of cis-1-isopropyl-4-methylcyclohexane and their relative stability (stability is indicated with ">" meaning "more stable than") .

Correct Answer
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You found an organic compound containing chiral carbon atom with the following four substituents: HC≡C-,Cl-,O=C- and H₂C=CH-.What would be the correct order of their priorities?

Correct Answer
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Which class of compounds is the least reactive?

Correct Answer
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Give the condensed structural formula for 3-bromopentane.

Correct Answer
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Exam 26: Structures of Organic Compounds

In alkene nomenclature "trans" stands for "on the same side" while "cis" means "across."

Correct AnswerverifiedShow Answer

Choose the best configuration assignments for the three double bonds,labeled A,B and C,in the following compound:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following compounds is(are) Z configuration(s) ?

Correct AnswerverifiedShow Answer

Give the condensed structural formula for 3-methyl-3-hexene.

Correct AnswerverifiedShow Answer

Calculate the degree of unsaturation for the molecule below:

Correct AnswerverifiedShow Answer

How many isomers are there for C5H12?

Correct AnswerverifiedShow Answer

Give the condensed structural formula for 2-methylpropanoic acid.

Correct AnswerverifiedShow Answer

Compounds I) to V) are all cyclic compounds.How many heterocyclic compounds are among them?

Correct AnswerverifiedShow Answer

What is the degree of unsaturation for the following compounds?

Correct AnswerverifiedShow Answer

Choose the INCORRECT statement.

Correct AnswerverifiedShow Answer

Give the name for CH3CH2CH2COCH2CH3.

Correct AnswerverifiedShow Answer

Combustion of 493 mg of a hydrocarbon gave 1549 mg CO2 and 633.9 mg H2O.What is the molecular formula if the molecular weight is subsequently found to be 42?

Correct AnswerverifiedShow Answer

Which of the following four molecules are aromatic?

Correct AnswerverifiedShow Answer

Which of the following compounds is(are) chiral?

Correct AnswerverifiedShow Answer

Find the answer that has correct both the two structures of cis-1-isopropyl-4-methylcyclohexane and their relative stability (stability is indicated with ">" meaning "more stable than") .

Correct AnswerverifiedShow Answer

You found an organic compound containing chiral carbon atom with the following four substituents: HC≡C-,Cl-,O=C- and H2C=CH-.What would be the correct order of their priorities?

Correct AnswerverifiedShow Answer

Which class of compounds is the least reactive?

Correct AnswerverifiedShow Answer

Give the condensed structural formula for 3-bromopentane.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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How many isomers are there for C₅H₁₂?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Give the name for CH₃CH₂CH₂COCH₂CH₃.

Correct Answer
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Combustion of 493 mg of a hydrocarbon gave 1549 mg CO₂ and 633.9 mg H₂O.What is the molecular formula if the molecular weight is subsequently found to be 42?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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You found an organic compound containing chiral carbon atom with the following four substituents: HC≡C-,Cl-,O=C- and H₂C=CH-.What would be the correct order of their priorities?

Correct Answer
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Correct Answer
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Correct Answer
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