Deck 18: Organic Chemistry

Question 1

Hydrocarbons contain carbon,hydrogen and oxygen.

Answer 1

False

Question 2

An ethyl group can be symbolized as -CH₃.

Answer 2

False

Question 3

Isomers are compounds with the same structures but different formulas.

Answer 3

False

Question 4

Alkanes contain double and single bonds.

Question 5

The formula of n-octane is: C
C
C
C
C
C
.

Question 6

An open -chain (noncyclic)hydrocarbon will always have exactly twice as many hydrogen atoms as carbon atoms.

Question 7

All organic molecules contain carbon but not all carbon compounds are organic compounds.

Question 8

Alkenes and alkynes are unsaturated hydrocarbons.

Question 9

The study of carbon-containing compounds and their reactions is called carbonyl chemistry.

Question 10

Carbon must always form four bonds in stable compounds.

Question 11

Organic compounds have to come from living things.

Question 12

It was originally thought that organic compounds had to come from living things.

Question 13

Molecules containing carbon always assume a tetrahedral molecular geometry since carbon forms four bonds.

Question 14

A noncyclical alkane hydrocarbon containing eight carbon atoms should also contain eighteen hydrogen atoms.

Question 15

Alkynes are compounds with at least one triple bond.

Question 16

An alkane would be considered a saturated compound.

Question 17

The compound with the formula CH₄ has four possible isomers.

Question 18

As the number of carbon atoms increases in n-alkanes,so does their boiling point.

Question 19

Isomers have the same molecular formula but have different properties.

Question 20

Isomerism is very rare in organic compounds.

Question 21

The compound C
N
can be classified as an amine.

Question 22

Aromatic compounds contain a benzene ring.

Question 23

The generic condensed structural formula for carboxylic acids is RCOOH.

Question 24

The compound CH₃CH₂CH=CHCH₃ is named 3-pentene.

Question 25

R-O-R is an ether functional group.

Question 26

R- OH is an ether functional group.

Question 27

Aldehydes and ketones both contain a carbonyl group.

Question 28

Esters are best known for their awful odors such as that associated with the smell of rotten fish.

Question 29

1-hexene and 1-hexyne are isomers.

Question 30

Combustion reactions always produce water and carbon monoxide.

Question 31

The formula for ethyl propyl ether is: C
C
OC
C
C
.

Question 32

Amines are nitrogen- containing organic compounds.

Question 33

C
C
C
C
C
OH is named 5-pentanol.

Question 34

Even though the aromatic ring of the compound benzene can be drawn with alternating single and double bonds,all the carbon to carbon bonds are the same.

Question 35

The formula of methyl propanoate is: C
C
COOC
.

Question 36

The formula of propanoic acid is: C
C
COOH.

Question 37

Alkanes cannot undergo addition reactions because they do not have a multiple bond.

Question 38

Hydrocarbon combustion reactions are highly endothermic - they absorb large amounts of heat.

Question 39

A polymer is a long chainlike compound containing a random arrangement of organic molecules called monomers.

Question 40

When an alkene undergoes an addition reaction to form an alkane,a saturated compound has been converted to an unsaturated compound.

Question 41

What is the molecular geometry of the underlined carbon atom in the following compound,
?

A)tetrahedral
B)trigonal planar
C)linear
D)bent
E)none of the above

Question 42

Which is the name of

?

A)n-butane
B)n-hexane
C)n-heptane
D)n-pentane
E)all of the above

Question 43

Which of the following statements about carbon is FALSE?

A)Carbon must always have four bonds.
B)Carbon can bond to itself.
C)Carbon can have either a tetrahedral,trigonal planar or linear geometry.
D)Carbon can form into linear,branched and cyclic compounds.
E)none of the above

Question 44

Which is the name of

?

A)n-butane
B)n-hexane
C)n-heptane
D)n-pentane
E)all of the above

Question 45

What is the molecular geometry of the underlined carbon atom in the following compound,
?

A)tetrahedral
B)trigonal planar
C)linear
D)bent
E)none of the above

Question 46

What is the molecular geometry of the underlined carbon atom in the following compound,
?

A)tetrahedral
B)trigonal planar
C)linear
D)bent
E)none of the above

Question 47

Two compounds are considered as isomers if they have the:

A)same molecular formula AND different structure.
B)same molecular formula AND same structure.
C)different molecular formula AND different structure.
D)different molecular formula AND same structure.
E)same molecular formula OR same structure.

Question 48

Which of the following is not a proper condensed structural formula for a normal alkane?

A)CH₃CH₂CH₂CH₃
B)CH₂CH₃CH₃
C)CH₃CH₂CH₂CH₂CH₃
D)CH₃CH₃
E)none of the above

Question 49

Consider the following n-alkanes: CH₄,C₂H₆,C₃H₈,C₄H_{10
Which of these would you expect to have the highest boiling point?}

A)CH₄
B)C₂H₆
C)C₃H₈
D)C₄H₁₀
E)all n-alkanes have the same boiling point

Question 50

Which type of hydrocarbon is classified as being saturated?

A)alkanes
B)alkenes
C)alkynes
D)all of these
E)none of the above

Question 51

Production of the synthetic polymer "polyethylene" uses an alkene as a starting monomer unit.

Question 52

What chemical reaction was used by the German chemist Friedrich Wohler to synthesize urea for the first time?

A)evaporating urine
B)heating ammonium cyanate
C)heating ammonium cyanide
D)combining the elements carbon,hydrogen,oxygen,and nitrogen
E)none of the above

Question 53

Hydrocarbons are commonly used for:

A)fuel.
B)wax.
C)fabrics.
D)plastics.
E)all of the above

Question 54

Based on the molecular formulas shown below,which compound shown below could be classified as a cyclical alkane?

A)C₄H₁₀
B)C₃H₈
C)C₅H₁₂
D)C₁₂H₂₄
E)C₉H₂₀

Question 55

Which of the following is the formula for heptane?

A)

B)

C)

D)

E)all of the above

Question 56

Which compound below is an alkane?

A)

B)C
C

C

C)

D)C
C

C

C

C

E)all of the above

Question 57

A straight chain saturated hydrocarbon has eight carbon atoms.Its molecular formula is:

A)C₈H₁₄.
B)C₈H₁₆.
C)C₈H₁₈.
D)C₈H₂₄.
E)none of the above

Question 58

What will be the molecular geometry of an open-chain noncyclical hydrocarbon with the generic molecular formula C_nH_2n-2?

A)linear
B)tetrahedral
C)trigonal planar
D)trigonal pyramidal
E)none of the above

Question 59

Which formula represents butane?

A)

B)

C)

D)

E)all of the above

Question 60

Compare a six-carbon open-chain (noncyclic)hydrocarbon alkane,alkene,and alkyne.Which of these compounds would have the fewest number of hydrogen atoms?

A)the alkane
B)the alkyne
C)the alkene
D)all of these have the same number of hydrogen atoms
E)none of these contain hydrogen atoms

Question 61

What are the product(s)of:

A)


B)


+

C)

Cl + HCl
D)all of the above
E)none of the above

Question 62

What is the name of the following compound:
?

A)4-pentane
B)4-ene-pentane
C)1-pentene
D)2-pentane
E)none of the above

Question 63

Which of the following structural formulas is an isomer to n-nonane?

A)C- C- C- C-
- C
B)C-
- C-

- C -

- C
C)C-
- C-

- C- C
D)
- C-

- C- C- C
E)none of the above

Question 64

Which of the following structural formulas is an isomer to n-hexane?

A)C- C- C- C-
- C
B)C-
- C- C-

- C
C)C-
- C-

- C
D)
- C-

- C
E)none of the above

Question 65

The compound named 2,3-dimethylpentane would have how many total number of carbons?

A)3
B)5
C)7
D)8
E)none of the above

Question 66

Which of the following compounds will undergo a substitution reaction?

A)

B)

C)

D)all of the above
E)none of the above

Question 67

The combustion of alkanes,alkenes and alkynes produces:

A)water and carbon.
B)oxygen and hydrogen.
C)carbon dioxide and hydrogen.
D)hydrogen and water.
E)carbon dioxide and water.

Question 68

Which of the following compounds is an alkene?

A)C₂H₆
B)C₃H₆
C)C₄H₆
D)C₅H₁₂
E)none of the above

Question 69

Name the following alkane: CH₃ -
-
- CH₂ - CH₃

A)3-isopropylbutane
B)3,4-dimethylpentane
C)2,3-dimethylpentane
D)2-isopropylbutane
E)none of the above

Question 70

The prefix "but-" means that the base chain contains how many carbon atoms?

A)2
B)4
C)6
D)8
E)all of the above

Question 71

How many isomers exist for the alkane whose molecular formula is C₄H₁₀?

A)1
B)2
C)3
D)4
E)none

Question 72

Which condensed structural formula is known as the propyl group?

A)-CH₂CH₂CH₂CH₃
B)-CH₂CH₃
C)-CH₂CH₂CH₃
D)-CH₃
E)none of the above

Question 73

Which of the following compounds will undergo an addition reaction?

A)

B)

C)

D)all of the above
E)none of the above

Question 74

What is the formula for propyne?

A)C₃H₈
B)C₃H₆
C)C₃H₄
D)C₃H₃
E)none of the above

Question 75

What are the products from the combustion of 2-methyl-3-ethyloctane?

A)variety of small hydrocarbons
B)carbon monoxide,carbon trioxide and water
C)carbon dioxide and water
D)carbon monoxide and water
E)none of the above

Question 76

What is the name of the following compound:
?

A)3-butene
B)1-butyne
C)2-butene
D)1-butene
E)none of the above

Question 77

Which of the following compounds is an alkyne?

A)C₂H₆
B)C₃H₆
C)C₂H₂
D)C₅H₁₂
E)none of the above

Question 78

What is the formula for propene?

A)C₃H₈
B)C₃H₆
C)C₃H₄
D)C₃H₃
E)none of the above

Question 79

Name the following alkene: CH₃ - CH = C - CH - CH₃
| |
CH₃ CH₃

A)2-propyl-2-isobutene
B)1-propyl-2-butene
C)1,1,3-trimethyl-1-pentene
D)3,4-dimethyl-2-pentene
E)none of the above

Question 80

Name the following alkane:
- CH₂ -
- CH₂ - CH₂ - CH₃

A)1,3-dimethylhexane
B)4-methylheptane
C)2-propylpentane
D)1-methyl-1-propylbutane
E)none of the above