Question 1

Which of the following is the correct condensed structural formula for the molecule shown in the first three images (a straight-chain alkane with six carbon atoms)?

Accepted Answer

$$CH_3CH_2CH_2CH_2CH_2CH_3$$

Question 2

What is the IUPAC name for the molecule represented by the line-angle structure in the third image?

Accepted Answer

Hexane

Question 3

Which of the following statements about alkanes is TRUE?

Accepted Answer

Alkanes are nonpolar and have low boiling points that increase with chain length.

Question 4

Given the structure in the fourth image, which functional group is present?

Accepted Answer

Ether

Question 5

What is the correct IUPAC name for the molecule shown in the fifth image (line-angle structure with an oxygen atom between two carbon chains)?

Accepted Answer

Tert-butyl ethyl ether

Question 6

Which of the following is the correct general formula for a straight-chain alkane?

Accepted Answer

$$C_nH_{2n+2}$$

Question 7

Which molecule shown in the images is a branched alkane?

Accepted Answer

Image 7 (branched chain)

Question 8

What is the correct IUPAC name for the molecule shown in the last image (branched alkane with two methyl groups on a hexane chain)?

Accepted Answer

2,4-dimethylhexane

Question 9

Which of the following is NOT a property of alkanes?

Accepted Answer

High reactivity

Question 10

Which of the following is the correct line-angle structure for pentane?

Accepted Answer

A zig-zag line with five vertices

Question 11

Which of the following molecules would have the highest boiling point?

Accepted Answer

Propanoic acid

Question 12

Which of the following is the correct IUPAC name for the molecule shown in the image with a cyclopentane ring attached to a heptane chain?

Accepted Answer

Cyclopentylheptane

Question 13

Which of the following is the correct formula for a cyclic alkane with six carbon atoms?

Accepted Answer

$$C_6H_{12}$$

Question 14

Which of the following is the correct IUPAC name for the molecule shown in the image with a tert-butyl group attached to a heptane chain?

Accepted Answer

4-tert-butyl-2-methylheptane

Question 15

Which of the following is the correct condensed formula for a branched alkane with two methyl groups on a hexane chain?

Accepted Answer

$$(CH_3$)_2CHCH_2CH(CH_3$)CH_2CH_3$$

Chapter 22: Organic Molecules – Structure, Nomenclature, and Functional Groups

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