Question 1

In the three-dimensional structure of methane, CH₄ , the hydrogen atoms attached to a carbon atom are aligned

Accepted Answer

A) in a straight line. 
B) at the corners of a square. 
C) at the corners of a tetrahedron. 
D) at the corners of a rectangle. 
E) at the corners of a cube. 
A) in a straight line. 
B) at the corners of a square. 
C) at the corners of a tetrahedron. 
D) at the corners of a rectangle. 
E) at the corners of a cube. C

Question 2

What is the name of the alkyl group CH₃ -CH2-CH2-?

Accepted Answer

A) propane 
B) methyl 
C) ethane 
D) ethyl 
E) propyl 
A) propane 
B) methyl 
C) ethane 
D) ethyl 
E) propyl E

Question 3

Small molecules that make up the repeat unit in polymers are called

Accepted Answer

A) monomers. 
B) alkenes. 
C) alkynes. 
D) minipolymers. 
E) synthetic polymers. 
A) monomers. 
B) alkenes. 
C) alkynes. 
D) minipolymers. 
E) synthetic polymers. A

Question 4

The IUPAC name of CH₃ -CH = CH-CH₃ is

Accepted Answer

A) 2-butene. 
B) 2-butane. 
C) 1-butene. 
D) butene. 
E) 2-butyne. 
A) 2-butene. 
B) 2-butane. 
C) 1-butene. 
D) butene. 
E) 2-butyne.

Question 5

What is the IUPAC name for the following?

Accepted Answer

A) 1-methylbutane 
B) 4-methylbutane 
C) pentane 
D) butane 
E) hexane 
A) 1-methylbutane 
B) 4-methylbutane 
C) pentane 
D) butane 
E) hexane

Question 6

What is the name for an eight-carbon continuous-chain alkane?

Accepted Answer

A) hexane 
B) heptane 
C) octane 
D) nonane 
E) decane 
A) hexane 
B) heptane 
C) octane 
D) nonane 
E) decane

Question 7

According to the IUPAC convention for chemical naming, which part of a hydrocarbon is selected as the main chain for a hydrocarbon chain?

Accepted Answer

A) the most highly branched chain 
B) the shortest chain 
C) the longest chain drawn in a straight line 
D) the longest continuous chain, regardless of bends 
E) the chain with the most substituted carbons in it 
A) the most highly branched chain 
B) the shortest chain 
C) the longest chain drawn in a straight line 
D) the longest continuous chain, regardless of bends 
E) the chain with the most substituted carbons in it

Question 8

Alkynes contain double bonds.

Accepted Answer

A) True 
 B)False

Question 9

Hydrogenation of unsaturated vegetable oils raises the melting point and makes them more solid.

Accepted Answer

A) True 
 B)False

Question 10

Pentane contains six carbon atoms.

Accepted Answer

A) True 
 B)False

Question 11

What is the name of this compound? CH₃ - CH2- CH2- CH2- CH2- CH2- CH₃

Accepted Answer

A) hexane 
B) heptane 
C) octane 
D) butane 
E) pentane 
A) hexane 
B) heptane 
C) octane 
D) butane 
E) pentane

Question 12

What is the condensed structural formula for the compound 3-hexene?

Accepted Answer

A) 
  
B) CH2 = CH-CH2 -CH2 -CH2 -CH₃ 
C) CH₃-CH2-CH = CH-CH2-CH₃ 
D) CH₃-CH2-CH2-CH = CH-CH₃ 
E) CH₃-CH = CH-CH2-CH2-CH₃ 
A) 
  
B) CH2 = CH-CH2 -CH2 -CH2 -CH₃ 
C) CH₃-CH2-CH = CH-CH2-CH₃ 
D) CH₃-CH2-CH2-CH = CH-CH₃ 
E) CH₃-CH = CH-CH2-CH2-CH₃

Question 13

Long-chain molecules that consist of many repeating units are called

Accepted Answer

A) polymers. 
B) monomers. 
C) organic compounds. 
D) alkenes. 
E) alkanes. 
A) polymers. 
B) monomers. 
C) organic compounds. 
D) alkenes. 
E) alkanes.

Question 14

Solid alkanes are found on the surface of many fruits and vegetables.

Accepted Answer

A) True 
 B)False

Question 15

According to the IUPAC convention, alkyl substituents on a hydrocarbon chain should be listed in which order?

Accepted Answer

A) alphabetical including prefixes 
B) alphabetical without considering prefixes 
C) in order with the substituent having the highest number of carbons first 
D) in order with the substituent having the lowest number of carbons first 
E) in order with the substituent having the highest total number of carbons first 
A) alphabetical including prefixes 
B) alphabetical without considering prefixes 
C) in order with the substituent having the highest number of carbons first 
D) in order with the substituent having the lowest number of carbons first 
E) in order with the substituent having the highest total number of carbons first

Question 16

What is the name of the compound below?

Accepted Answer

A) 1-chlorotoluene 
B) 2-chlorotoluene 
C) 3-chlorotoluene 
D) 4-chlorotoluene 
E) 5-chlorotoluene 
A) 1-chlorotoluene 
B) 2-chlorotoluene 
C) 3-chlorotoluene 
D) 4-chlorotoluene 
E) 5-chlorotoluene

Question 17

What is the mame for a six-carbon continuous-chain alkane?

Accepted Answer

A) hexane 
B) heptane 
C) octane 
D) nonane 
E) decane 
A) hexane 
B) heptane 
C) octane 
D) nonane 
E) decane

Question 18

All polycyclic aromatic compounds cause cancer.

Accepted Answer

A) True 
 B)False

Question 19

What is the name of this compound?

Accepted Answer

A) 1,1-dichlorobutane 
B) 1,2,-dichlorobutane 
C) 1,3-dichlorobutane 
D) 1,4-dichlorobutane 
E) dichlorobutane 
A) 1,1-dichlorobutane 
B) 1,2,-dichlorobutane 
C) 1,3-dichlorobutane 
D) 1,4-dichlorobutane 
E) dichlorobutane

Question 20

Octane is a seven-carbon continuous chain alkane.

Accepted Answer

A) True 
 B)False

Exam 12: Introduction to Organic Chemistry: Hydrocarbons

In the three-dimensional structure of methane, CH₄ , the hydrogen atoms attached to a carbon atom are aligned

What is the name of the alkyl group CH₃ -CH2-CH2-?

Small molecules that make up the repeat unit in polymers are called

The IUPAC name of CH₃ -CH = CH-CH₃ is

What is the IUPAC name for the following?

What is the name for an eight-carbon continuous-chain alkane?

According to the IUPAC convention for chemical naming, which part of a hydrocarbon is selected as the main chain for a hydrocarbon chain?

Alkynes contain double bonds.

Hydrogenation of unsaturated vegetable oils raises the melting point and makes them more solid.

Pentane contains six carbon atoms.

What is the name of this compound? CH₃ - CH2- CH2- CH2- CH2- CH2- CH₃

What is the condensed structural formula for the compound 3-hexene?

Long-chain molecules that consist of many repeating units are called

Solid alkanes are found on the surface of many fruits and vegetables.

According to the IUPAC convention, alkyl substituents on a hydrocarbon chain should be listed in which order?

What is the name of the compound below?

What is the mame for a six-carbon continuous-chain alkane?

All polycyclic aromatic compounds cause cancer.

What is the name of this compound?

Octane is a seven-carbon continuous chain alkane.

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