Question 1

How do inorganic compounds differ from organic compounds?

Accepted Answer

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. D

Question 2

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

Accepted Answer

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

Question 3

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

Accepted Answer

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

Question 4

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

Accepted Answer

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

Question 5

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

Accepted Answer

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

Question 6

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

Accepted Answer

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

Question 7

Which of the following statements about Taxol is false?

Accepted Answer

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 8

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?

Accepted Answer

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

Question 9

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

Accepted Answer

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

Question 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

How many carboxylic acids have the molecular formula C4H8O2?

Accepted Answer

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

Question 13

Which of the following compounds has the following functional group?

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

A)   CH3NH2
B)   3NH2 
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C)     
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C)   3NH2 
B)     
C)     
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D)   none of these

Question 16

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

Accepted Answer

A)   
B)   
C)   both  and
D)   none of these

Question 17

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?

Accepted Answer

A)   109.5°
B)   120°
C)   180°
D)   90°

Question 18

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

Accepted Answer

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

Question 19

How many secondary amines have the molecular formula C4H11N?

Accepted Answer

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

Question 20

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

Accepted Answer

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

Exam 10: Organic Chemistry

How do inorganic compounds differ from organic compounds?

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

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

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

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

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

Which of the following statements about Taxol is false?

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?

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

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

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

How many carboxylic acids have the molecular formula C₄H₈O₂?

Which of the following compounds has the following functional group?

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

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

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

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?

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

How many secondary amines have the molecular formula C₄H₁₁N?

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