Deck 10: Organic Chemistry

Question 1

What is the valency of each carbon atom in an ethylene molecule?

A) 5
B) 4
C) 8
D) 6

Answer 1

B

Question 2

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

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

Answer 2

B

Question 3

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

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

Answer 3

C

Question 4

Which of the following is a property of most organic compounds?

A) Organic compounds are typically high-melting solids.
B) All organic compounds are soluble in water.
C) Organic compounds are typically high-melting solids and all organic compounds are soluble in water.
D) None of these

Question 5

Which of the following chemicals in its pure natural form will have properties different from its pure synthetic form?

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

Question 6

Which of the following statements about organic chemistry is false?

A) Organic chemistry involves the study of compounds that 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 different natural laws.

Question 7

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 8

Which of the following is true of organic compounds?

A) Most organic compounds are gases, liquids, or low-melting solids.
B) Approximately 5% of all known compounds are organic compounds.
C) Most organic compounds are gases, liquids, or low-melting solids, and approximately 5% of all known compounds are organic compounds.
D) None of these,

Question 9

In organic compounds, which of the following elements forms two covalent bonds and has two unshared pairs of electrons?

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

Question 10

How do inorganic compounds differ from organic compounds?

A) Inorganic compounds form covalent bonds, whereas organic compounds form ionic bonds.
B) Inorganic compounds are solids with low melting points, whereas organic compounds are solids with high melting points.
C) Inorganic compounds are insoluble in water, whereas organic compounds are soluble in water.
D) Inorganic compounds conduct electricity in their aqueous solutions, whereas organic compounds do not conduct electricity in their aqueous solutions.

Question 11

In organic compounds, which of the following elements forms three covalent bonds and has one unshared pair of electrons?

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

Question 12

Which of the following statements about Taxol is false?

A) Taxol is extracted 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 13

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

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

Question 14

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

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

Question 15

Which of the following statements about Taxol is false?

A) The bark of a single 100-year-old yew tree yields only about 1 gram of Taxol.
B) Taxol is effective in treating certain ovarian and breast cancers.
C) Synthetic Taxol and naturally obtained Taxol have the same properties.
D) None of these statements are false.

Question 16

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

A) Bonding in organic compounds is almost entirely covalent in nature.
B) Aqueous solutions of organic compounds do not conduct electricity.
C) Bonding in organic compounds is almost entirely covalent in nature, and aqueous solutions of organic compounds do not conduct electricity.
D) None of these.

Question 17

Which of the following statements regarding urea is incorrect?

A) Urea is an organic compound found in urine.
B) Urea can be synthesized using inorganic compounds.
C) Urea contains a carbonyl group attached to two amino groups.
D) Urea is a protein made up of two amino acids.

Question 18

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

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

Question 19

Which of the following statements is true of organic compounds?

A) Only naturally occurring compounds are considered organic compounds.
B) Natural vitamin C has a higher boiling point than synthetic vitamin C.
C) Valium, Zoloft, and Prozac are examples of naturally occurring organic compounds.
D) Natural gas, petroleum, and coal are natural sources of organic compounds.

Question 20

What is the bond angle at the carbon atom of a methane molecule?

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

Question 21

What is the difference between the carbonyl carbons in acetaldehyde and acetone?

A) The carbonyl carbon is bonded to two carbon atoms in acetaldehyde, whereas the carbonyl carbon is bonded to three carbon atoms in acetone.
B) The carbonyl carbon is bonded to one carbon atom in acetaldehyde, whereas the carbonyl carbon is bonded to three carbon atoms in acetone.
C) The carbonyl carbon is bonded to one carbon atom in acetaldehyde, whereas the carbonyl carbon is bonded to two carbon atoms in acetone.
D) The carbonyl carbon is bonded to two carbon atoms in acetaldehyde, whereas the carbonyl carbon is bonded to one carbon atom in acetone.

Question 22

Which of the following organic compounds must have at least two oxygen atoms in its functional groups?

A) ethyl alcohol
B) acetamide
C) acetic acid
D) acetone

Question 23

Identify the correct statement about tertiary alcohols.

A) The carbon bearing the hydroxyl group has three carbon atoms bonded to it.
B) The carbon bearing the hydroxyl group has two carbon atoms bonded to it.
C) The carbon bearing the hydroxyl group has four carbon atoms bonded to it.
D) The carbon bearing the hydroxyl group has five carbon atoms bonded to it.

Question 24

What is the functional group present in a formaldehyde molecule?

A) carbonyl
B) carboxyl
C) hydroxyl
D) amide

Question 25

Which of the following classes of organic compounds has a functional group consisting of an oxygen atom bonded to a hydrogen atom?

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

Question 26

Which of the following classes of organic compounds must have at least two oxygen atoms in its functional groups?

A) carboxylic acids
B) carboxylic esters
C) carboxylic acids and esters
D) none of these

Question 27

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 28

Which of the following atoms is connected to the carbonyl group of an amide?

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

Question 29

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

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

Question 30

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 31

Which of the following classes of organic compounds has a functional group consisting of an oxygen atom bonded to a hydrogen atom?

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

Question 32

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

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

Question 33

Which of the following bonds links different amino acids in a protein?

A) amide bond
B) amine bond
C) amido bond
D) imine bond

Question 34

Which of the following organic compounds must have at least two oxygen atoms in its functional groups?

A) carboxylic esters
B) ketones
C) carboxylic esters and ketones
D) none of these

Question 35

Identify a correct statement about functional groups in organic compounds.

A) In a tertiary amine, the nitrogen is bonded to two carbon atoms.
B) Methyl acetate is an example of an ester.
C) In acetic acid, the carbonyl group is attached to a hydrogen atom.
D) In 1-propanol, the hydroxyl group is attached to an octahedral carbon atom.

Question 36

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 37

Which of the following compounds has the following functional group?

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

Question 38

Amino acids are molecules that contain both an amino group and a carboxyl group. Which elements are 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 39

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 40

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 41

How many carboxylic esters have the molecular formula C₃H₆O₂?

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

Question 42

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

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

Question 43

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

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

Question 44

Which of the following is an example of an aldehyde?

A) CH₃COOH
B) CH₃CH₂OH
C) CH₃CHO
D)

Question 45

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

A) CH₃NH₂
B)
C)
D) none of these

Question 46

Which of the following is an example of a ketone?

A) CH₃CH₂OH
B)
C)
D)

Question 47

How many aldehydes have the molecular formula C₄H₈O?

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

Question 48

How many secondary amines have the molecular formula C₄H₁₁N?

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

Question 49

How many amines have the molecular formula C₃H₉N?

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

Question 50

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

A) CH₃NH₂
B)
C)
D) none of these

Question 51

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

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

Question 52

How many ketones have the molecular formula C₅H₁₀O?

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

Question 53

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

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

Question 54

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

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

Question 55

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

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

Question 56

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

A)
B)
C) both and

D) none of these

Question 57

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

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

Question 58

How many carboxylic acids have the molecular formula C₄H₈O₂?

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

Question 59

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

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

Question 60

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

A)
B)
C) both and

D) none of these

Question 61

A ball-and-stick model of an organic compound has been provided below. Which of the following ball-and-stick models has the same functional group as that of this model? 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

Question 62

Answer the following questions based on the ball-and-stick model given below. Atoms other than carbon and hydrogen are labeled with the symbol of the element. What is the bond angle at the carbon atom bonded to the oxygen atom?

A) 109.5°
B) 120°
C) 180°
D) 90°

Question 63

Answer the following questions based on the ball-and-stick models given below. Atoms other than carbon and hydrogen are labeled with the symbol of the element. Which of the following ball-and-stick models represents a secondary alcohol?

A) A
B) B
C) C
D) D
E) none of these

Question 64

Answer the following questions based on the ball-and-stick models given below. Atoms other than carbon and hydrogen are labeled with the symbol of the element. Which of the following ball-and-stick models has a carbonyl functional group?

A) A
B) B
C) C
D) D
E) none of these

Question 65

Answer the following questions based on the ball-and-stick model given below. Atoms other than carbon and hydrogen are labeled with the symbol of the element. Which functional group does this compound contain?

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

Question 66

Answer the following questions based on the ball-and-stick models given below. Atoms other than carbon and hydrogen are labeled with the symbol of the element. Which of the following ball-and-stick models represents a secondary amine?

A) A
B) B
C) C
D) D
E) none of these

Question 67

Answer the following questions based on the ball-and-stick models given below. Atoms other than carbon and hydrogen are labeled with the symbol of the element. Which of the following ball-and-stick models represents an ester?

A) A
B) B
C) C
D) D
E) none of these

Question 68

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

A) CH₃CH₂OH
B)
C)
D)

Question 69

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

A)
B)
C) both and

D) none of these

Question 70

Answer the following questions based on the ball-and-stick models given below. Atoms other than carbon and hydrogen are labeled with the symbol of the element. Which of the following ball-and-stick models represents a derivative of a carboxylic acid?

A) A
B) B
C) C
D) D
E) none of these

Question 71

Answer the following questions based on the ball-and-stick model given below. Atoms other than carbon and hydrogen are labeled with the symbol of the element. Which of the following compounds contains the same functional group as in this molecule?

A) acetone
B) acetaldehyde
C) pentane
D) acetylene
E) all of these