Deck 18: Organic Chemistry

Question 1

Organic compounds have to come from living things.

Answer 1

False

Question 2

Alkynes are compounds with at least one triple bond.

Answer 2

True

Question 3

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

Answer 3

True

Question 4

Isomers are compounds with the same structures but different formulas.

Question 5

Alkanes undergo addition reactions.

Question 6

Carbon must always form four bonds.

Question 7

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

Question 8

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

Question 9

Alkenes and alkynes are unsaturated hydrocarbons.

Question 10

Combustion reactions always produce water and carbon monoxide.

Question 11

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

Question 12

Isomerism is very rare in organic compounds.

Question 13

Alkanes contain double and single bonds.

Question 14

The formula of n-octane is: CH₃CH₂CH₂CH₂CH₂CH₃.

Question 15

1-hexene and 1-hexyne are isomers.

Question 16

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

Question 17

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

Question 18

Hydrocarbons contain carbon,hydrogen and oxygen.

Question 19

The compound with the formula CH₄ has four possible isomers.

Question 20

An ethyl group can be symbolized as -CH₃.

Question 21

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 22

The formula for ethyl propyl ether is: CH₃CH₂OCH₂CH₂CH₃.

Question 23

The generic condensed structural formula for carboxylic acids is RCOOH.

Question 24

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

Question 25

Amines are nitrogen- containing organic compounds.

Question 26

CH₃CH₂CH₂CH₂CH₂OH is named 5-pentanol.

Question 27

Aromatic compounds contain a benzene ring.

Question 28

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 29

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 30

R- OH is an ether functional group.

Question 31

Aldehydes and ketones both contain a carbonyl group.

Question 32

The formula of propanoic acid is: CH₂CH₂COOH.

Question 33

The compound CH₃NH₂ can be classified as an amine.

Question 34

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

Question 35

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 36

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

Question 37

R-O-R is an ether functional group.

Question 38

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 39

The formula of methyl propanoate is: CH₃CH₂COOCH₃.

Question 40

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

Question 41

Which of the following compounds is an alkene?

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

Question 42

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 43

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 44

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 45

Which is the name of C₅H₁₂?

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

Question 46

Which of the following is the formula for heptane?

A)C₄H₁₀
B)C₃H₈
C)C₇H₁₆
D)C₂H₆
E)all of the above

Question 47

Which of the following compounds is an alkyne?

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

Question 48

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 49

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

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

Question 50

Which formula represents butane?

A)C₄H₁₀
B)C₃H₈
C)C₇H₁₆
D)C₂H₆
E)all of the above

Question 51

Which is the name of C₆H₁₄?

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

Question 52

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 53

Based on the molecular formulas shown below,which compound shown below would NOT be classified as a noncyclical alkane?

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

Question 54

Hydrocarbons are commonly used for:

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

Question 55

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 56

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 57

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

Question 58

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 59

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 60

Which compound below is an alkane?

A)C₄H₁₀
B)CH₃CH₂CH₃
C)C₇H₁₆
D)CH₃CH₂CH₂CH₂CH₃
E)all of the above

Question 61

What will be the major product(s)when C₂H₂ undergoes an addition reaction with Cl₂?

A)C₂HCl+ HCl
B)C₂H₂Cl₂
C)C₂Cl₂ + H₂
D)all of the above
E)none of the above

Question 62

Which of the following compounds will undergo a substitution reaction?

A)C₂H₄
B)C₂H₂
C)C₂H₆
D)all of the above
E)none of the above

Question 63

Which of the following functional groups represents an alcohol?

A)R-
B)R -
- R
C)R -
- OH
D)R -
-O R
E)none of the above

Question 64

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 65

What is the formula for propene?

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

Question 66

What will be the major product(s)when C₂H₄ undergoes an addition reaction with Cl₂?

A)C₂H₃Cl₂
B)C₂H₄Cl₂
C)C₂H₂Cl₂
D)all of the above
E)none of the above

Question 67

In naming disubstituted benzenes,"1,2" substitution is also known as:

A)ortho substitution.
B)meta substitution.
C)para substitution.
D)isomer substitution.
E)none of the above

Question 68

The reaction CH₃CH₃ + Br₂ → CH₃CH₂Br + HBr would best be described as:

A)substitution.
B)combustion.
C)addition.
D)hydrogenation.
E)none of the above

Question 69

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 70

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 71

The reaction CH₂=CH₂ + H₂ → CH₃CH₃ would best be described as:

A)substitution.
B)combustion.
C)addition.
D)hydrogenation.
E)none of the above

Question 72

What is the formula for propyne?

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

Question 73

Name the following alkane: CH₃ - C = C - CH₂ - 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 74

How many carbon atoms would be in the compound named chlorobenzene?

A)1
B)5
C)6
D)7
E)none of the above

Question 75

Name the aromatic compound shown below:

A)Phenyl bromide
B)Benzyl bromide
C)Bromobenzene
D)Phenol
E)none of the above

Question 76

The reaction CH₂=CH₂ + Br₂ → CHBrCHBr would best be described as:

A)substitution.
B)combustion.
C)addition.
D)hydrogenation.
E)none of the above

Question 77

What are the product(s)of: C₂H₆ + Cl₂ $\to$ ?

A)C₂H₆Cl₂
B)C₂H₄Cl₂ + H₂
C)C₂H₅Cl + HCl
D)all of the above
E)none of the above

Question 78

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 79

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 80

Which of the following compounds will undergo an addition reaction?

A)C₃H₈
B)C₂H₄
C)C₂H₆
D)all of the above
E)none of the above