Question 1

Which of the following best describes an alkene?

Accepted Answer

A hydrocarbon that contains a C=C double bond

Question 2

What is the correct IUPAC name for the following molecule: $$CH_3CH_2CH_2CH=CH_2$?

Accepted Answer

1-pentene

Question 3

Which statement about cis-trans isomerism in alkenes is correct?

Accepted Answer

Cis-trans isomerism occurs when two different groups are attached to each carbon of the double bond, preventing rotation.

Question 4

What is the molecular geometry around each carbon atom in ethylene ($$C_2H_4$$)?

Accepted Answer

Trigonal planar, with bond angles of $$120^	ext{o}$$

Question 5

Which of the following compounds is a constitutional isomer of $$C_4H_8$$?

Accepted Answer

1-butene

Question 6

A molecule has the formula $$CH_3CH_2C \equiv CH. $$What is its IUPAC name?

Accepted Answer

1-butyne

Question 7

Which of the following is the correct order of boiling points (lowest to highest) for the following compounds: propane, dimethyl ether, ethanol?

Accepted Answer

Propane \u003c Dimethyl ether \u003c Ethanol

Question 8

Which functional group is present in phenol?

Accepted Answer

An $$-OH$$ group bonded to an aromatic ring

Question 9

What is the correct IUPAC name for the following structure: $$CH_3CH_2CH(OH)CH_3$?

Accepted Answer

2-butanol

Question 10

Which of the following statements about alcohols is true?

Accepted Answer

A secondary alcohol has the $$-OH$$ group attached to a carbon bonded to two other carbons.

Question 11

Which compound is more water soluble: 1,4-butanediol or 1-butanol? Why?

Accepted Answer

1,4-butanediol, because it has two hydroxyl groups increasing hydrogen bonding

Question 12

Which of the following is the correct IUPAC name for a molecule with a six-carbon chain, a triple bond between carbons 2 and 3, and a methyl group on carbon 5?

Accepted Answer

5-methyl-2-hexyne

Question 13

Which of the following is a correct description of an ether functional group?

Accepted Answer

An oxygen atom bonded to two alkyl or aryl groups ($$R-O-R)$$

Question 14

Which of the following is a correct statement about the boiling points of alcohols and ethers?

Accepted Answer

Alcohols generally have higher boiling points than ethers of similar molecular weight due to hydrogen bonding.

Question 15

What is the correct IUPAC name for $$CH_3CH_2CH_2Br$$?

Accepted Answer

1-bromopropane

Question 16

Which of the following molecules can exhibit cis-trans isomerism?

Accepted Answer

$$CH_3CH=$$CHCH_3$$

Question 17

Which of the following is the correct IUPAC name for a molecule with the structure $$CH_3CH_2CH_2CH_2OH$$?

Accepted Answer

1-butanol

Question 18

Which of the following is a correct description of a primary alcohol?

Accepted Answer

The carbon attached to the $$-OH$$ group is bonded to one other carbon

Question 19

Which of the following is the correct IUPAC name for $$CH_3CH_2OCH_3$$?

Accepted Answer

Ethyl methyl ether

Alkenes & Alkynes: Structure, Nomenclature, and Isomerism

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