Deck 10: Organic Chemistry

Question 1

Approximately how many new organic compounds are reported each year?

A) 1000
B) 10,000
C) 100,000
D) 1,000,000

Answer 1

B

Question 2

Which element accounts for the largest percentage of the earth's crust?

A) carbon
B) nitrogen
C) oxygen
D) silicon

Answer 2

C

Question 3

If the bond angle at a carbon atom is 180°, how many groups are distributed around the carbon atom?

A) 1
B) 2
C) 3
D) 4

Answer 3

B

Question 4

Which of the following statements about organic compounds is true?

A) Only naturally occurring compounds are considered organic compounds.
B) The number of naturally occurring compounds and the number of synthetic compounds are approximately equal.
C) The number of naturally occurring compounds greatly exceeds the number of synthetic compounds.
D) The number of naturally occurring compounds is much smaller than the number of synthetic compounds.

Question 5

The chemical formula of methylamine is CH₃NH₂. How many valence electrons are associated with a molecule of methylamine?

A) 7
B) 8
C) 12
D) 14

Question 6

Chemicals in which of the following groups are not considered organic chemicals?

A) enzymes
B) minerals
C) proteins
D) vitamins

Question 7

Which of the following is generally true of organic compounds?

A) they are typically high melting solids
B) most are soluble in water
C) both a and b
D) neither a nor b

Question 8

Which of the following statements about taxol is false?

A) About 1 gram can be obtained from a 100 year old tree.
B) It is effective in treating certain ovarian and breast cancers.
C) Taxol synthesized in the laboratory is identical to naturally obtained taxol.
D) None, all of the above are true.

Question 9

If the bond angles at a carbon atom are 120°, how many groups are distributed around the carbon atom?

A) 1
B) 2
C) 3
D) 4

Question 10

Which of the following is generally true of most organic compounds?

A) their bonding is covalent in nature
B) their aqueous solutions conduct electricity
C) both a and b
D) neither a nor b

Question 11

Which of the following statements is false?

A) Organic chemistry involves the study of compounds which contain carbon.
B) Organic compounds cannot be synthesized in the laboratory.
C) The most common elements found in organic compounds are carbon, hydrogen, nitrogen, and oxygen.
D) Organic and inorganic compounds obey the same natural laws.

Question 12

In organic compounds, which of the following elements normally forms two covalent bonds?

A) carbon
B) hydrogen
C) nitrogen
D) oxygen

Question 13

A chemist has two pure samples of an organic compound, one of which she obtained from a natural source, and one of which she synthesized in the lab. Which of the following properties can she use to determine which is the synthetic sample?

A) boiling point
B) formula weight
C) solubility
D) none of these

Question 14

Which of the following is true of organic compounds?

A) most are gases, liquids, or low melting solids
B) they represent only 5% of all known compounds
C) both a and b
D) neither a nor b

Question 15

The bond angles around the carbon atom in methane (CH₄) are all:

A) 180^o
B) 120^o
C) 109.5^o
D) 90^o

Question 16

Which of the following chemicals, when pure, will have different properties if it is synthesized in the laboratory than if it is obtained from a natural source?

A) ethanol
B) taxol
C) vitamin C
D) none of these

Question 17

Which of the following statements about taxol is false?

A) Taxol is no longer obtained primarily from the bark of the Pacific yew.
B) Taxol and paclitaxel are two different but related anticancer drugs.
C) Taxol has been successfully synthesized by chemists.
D) Taxol inhibits cell division by preventing the disassembly of microtubules.

Question 18

In organic compounds, which of the following elements normally forms three covalent bonds?

A) carbon
B) hydrogen
C) nitrogen
D) oxygen

Question 19

If the bond angles at a carbon atom are 109.5°, how many groups are distributed around the carbon atom?

A) 1
B) 2
C) 3
D) 4

Question 20

Which of the following geometries is never associated with a carbon atom in an organic compound?

A) linear
B) square planar
C) tetrahedral
D) trigonal planar

Question 21

The group is the functional group of which of the following types of compounds?

A) carboxylic acids
B) aldehydes
C) carboxylic esters
D) ketones

Question 22

In which of the following classes of organic compounds is an oxygen atom bonded to a hydrogen atom?

A) aldehydes
B) carboxylic acids
C) ketones
D) all of these

Question 23

In which of the following classes of organic compounds is an oxygen atom bonded to a hydrogen atom?

A) alcohols
B) aldehydes
C) amines
D) all of these

Question 24

What is the minimum number of hydrogen atoms present in a carboxylic acid?

A) 1
B) 2
C) 3
D) 4

Question 25

Which of the following classes of compounds can be categorized as primary, secondary, or tertiary?

A) alcohols
B) aldehydes
C) carboxylic acids
D) ketones

Question 26

Which of the following functional groups does not contain a carbonyl group?

A) ester
B) alcohol
C) aldehyde
D) ketone

Question 27

The chemical formula of methanol is CH₃OH. How many unshared electron pairs are associated with a molecule of methanol?

A) 1
B) 2
C) 4
D) 6

Question 28

Amino acids are molecules which contain both an amino group and a carboxyl group. Which atomic species must be present in all amino acids?

A) C and H
B) C, H, and N
C) C, H, and O
D) C, H, N, and O

Question 29

In which of the following classes of organic compounds must every compound contain more than one carbon atom?

A) alcohols
B) aldehydes
C) carboxylic acids
D) ketones

Question 30

Of the four alcohols with molecular formula C₄H₁₀O, how many are primary alcohols?

A) 1
B) 2
C) 3
D) 4

Question 31

Which of the following statements is false?

A) In a secondary amine, the nitrogen is bonded to two carbon atoms.
B) In a tertiary alcohol, the carbon bearing the OH group is bonded to no hydrogen atoms.
C) Aldehydes, ketones, and esters all contain a carbonyl group.
D) The molecular formula for the smallest carboxylic acid is C₂H₄O₂.

Question 32

In which of the following classes of organic compounds must there be at least two oxygen atoms?

A) carboxylic esters
B) ketones
C) both a and b
D) neither a nor b

Question 33

The chemical formula of hydrogen cyanide is HCN. How many unshared electrons are associated with a molecule of hydrogen cyanide?

A) 2
B) 4
C) 6
D) 10

Question 34

In which of the following classes of organic compounds must there be at least two oxygen atoms?

A) alcohols
B) aldehydes
C) carboxylic acids
D) ketones

Question 35

In which of the following classes of organic compounds must there be at least two oxygen atoms?

A) carboxylic acids
B) carboxylic esters
C) both a and b
D) neither a nor b

Question 36

The chemical formula of hydrogen cyanide is HCN. How many valence electrons are associated with a molecule of hydrogen cyanide?

A) 4
B) 6
C) 10
D) 14

Question 37

Which of the following classes of compounds can be categorized as primary, secondary or, tertiary?

A) aldehydes
B) amines
C) carboxylic acids
D) ketones

Question 38

The chemical formula of acetylene is C₂H₂. How many valence electrons are associated with a molecule of acetylene?

A) 4
B) 5
C) 8
D) 10

Question 39

What is the minimum number of hydrogen atoms present in a carboxylic ester?

A) 1
B) 2
C) 4
D) 6

Question 40

The chemical formula of methylamine is CH₃NH₂. How many unshared electron pairs are associated with a molecule of methylamine?

A) 1
B) 2
C) 8
D) 14

Question 41

Which of the following is an example of a secondary alcohol?

A) CH₃OH
B) CH₃CH₂OH
C) CH₃CH₂CH₂OH
D) none of these

Question 42

How many amines have the molecular formula C₃H₉N?

A) 1
B) 2
C) 3
D) 4

Question 43

Which of the following is an example of a carboxylic acid?

A) CH₃CH₂OH
B)
C)
D)

Question 44

How many aldehydes have the molecular formula C₄H₈O?

A) 1
B) 2
C) 3
D) 4

Question 45

Which of the following is an example of a tertiary amine?

A) CH₃NH₂
B) CH₃CH₂NH₂
C) CH₃CH₂CH₂NH₂
D) none of these

Question 46

How many ketones have the molecular formula C₅H₁₀O?

A) 1
B) 2
C) 3
D) 4

Question 47

Which of the following is an example of a secondary alcohol?

A) CH₃OH
B)
C) CH₃CH₂OH
D) none of these

Question 48

How many carboxylic esters have the molecular formula C₃H₆O₂?

A) 1
B) 2
C) 3
D) 4

Question 49

Which of the following is an example of a secondary amine?

A) CH₃NH₂
B)
C)
D) none of these

Question 50

Which of the following is an example of a tertiary alcohol?

A) CH₃OH
B) CH₃CH₂OH
C) CH₃CH₂CH₂OH
D) none of these

Question 51

How many secondary amines have the molecular formula C₄H₁₁N?

A) 1
B) 2
C) 3
D) 4

Question 52

How many carboxylic acids have the molecular formula C₄H₈O₂?

A) 1
B) 2
C) 3
D) 4

Question 53

Which of the following is an example of a tertiary amine?

A) CH₃NH₂
B)
C)
D) none of these

Question 54

Which of the following is an example of a carboxylic acid?

A)
B)
C) both a and b
D) neither a nor b

Question 55

Which of the following is an example of a secondary amine?

A) CH₃NH₂
B) CH₃CH₂NH₂
C) CH₃CH₂NHCH₃
D) none of these

Question 56

Which of the following is an example of a carboxylic acid?

A)
B)
C) both a and b
D) neither a nor b

Question 57

Which of the following is an example of a carboxylic ester?

A) CH₃COOH
B) CH₃CH₂OH
C) CH₃CHO
D)

Question 58

Which of the following is an example of a secondary amine?

A) CH₃CH₂NH₂
B) CH₃CH₂CH₂NHCH₃
C)
D) none of these

Question 59

Which of the following is an example of a primary amine?

A) CH₃NH₂
B) CH₃CH₂NH₂
C) CH₃CH₂CH₂NH₂
D) all of these

Question 60

Which of the following is an example of a secondary amine?

A) CH₃NH₂
B) CH₃CH₂NH₂
C) CH₃CH₂CH₂NH₂
D) none of these

Question 61

Examine the following models. Atoms other than carbon and hydrogen are labeled with the symbol of the element. A B C D
Which model represents a derivative of a carboxylic acid?

A) A
B) B
C) C
D) D
E) None of these is a derivative of a carboxylic acid.

Question 62

Examine the following models. Atoms other than carbon and hydrogen are labeled with the symbol of the element. A B C D
Which model represents a secondary amine?

A) A
B) B
C) C
D) D
E) None of these is a secondary amine.

Question 63

Examine the following models. Atoms other than carbon and hydrogen are labeled with the symbol of the element. A B C D
Which model represents an ester?

A) A
B) B
C) C
D) D
E) None of these is an ester..

Question 64

Examine the following models. Atoms other than carbon and hydrogen are labeled with the symbol of the element. A B C D
Which of the models is in the same functional group as the compound represented below? Atoms other than carbon and hydrogen are labeled with the symbol of the element.

A) A
B) B
C) C
D) D
E) None of these is in the same functional group.

Question 65

Examine the following structure. Atoms other than carbon and hydrogen are labeled with the symbol of the element.
What are the bond angles around the carbon atom bonded to the oxygen atom?

A) 109.5°
B) 120°
C) 180°
D) 90°

Question 66

Examine the following models. Atoms other than carbon and hydrogen are labeled with the symbol of the element. A B C D
Which of the models could be represented by the following condensed formula? CH₃COOCH₃

A) A
B) B
C) C
D) D
E) None of these is a derivative of a carboxylic acid.

Question 67

Which of the following is an example a carboxylic ester?

A) CH₃CH₂OH
B)
C)
D)

Question 68

Examine the following structure. Atoms other than carbon and hydrogen are labeled with the symbol of the element.
What type of functional group is present in this compound?

A) ketone
B) aldehyde
C) ester
D) carboxylic acid

Question 69

Examine the following models. Atoms other than carbon and hydrogen are labeled with the symbol of the element. A B C D
Which model represents a secondary alcohol?

A) A
B) B
C) C
D) D
E) None of these is a secondary alcohol.

Question 70

Which of the following is an example a carboxylic ester?

A)
B)
C) both a and b
D) neither a nor b