Question 1

Which of the following is the correct general formula for an unbranched alkane?

Accepted Answer

$$C_nH_{2n+2}$$

Question 2

Which of the following statements about alkanes is TRUE?

Accepted Answer

Alkanes are found in natural gas and petroleum.

Question 3

Which of the following is a constitutional isomer of $$n-$$butane ($$C_4H_{10}$$)?

Accepted Answer

Isobutane

Question 4

According to IUPAC rules, what is the correct name for the following structure?

$$CH_3CH_2CH(CH_3$)CH_2CH_3$$

Accepted Answer

3-methylpentane

Question 5

Which of the following statements about the boiling points of alkanes is correct?

Accepted Answer

Boiling point increases as the number of carbons in the alkane increases.

Question 6

Which of the following is the correct IUPAC name for a molecule with the structure:

$$CH_3CH_2CH_2CH_2CH_3$$

Accepted Answer

n-pentane

Question 7

A hydrocarbon with the formula $$C_5H_{12}$$ could be which of the following?

Accepted Answer

n-pentane

Question 8

When naming an alkane, which rule should be applied if there are two longest chains of equal length?

Accepted Answer

Choose the chain with the greatest number of substituents.

Question 9

What is the IUPAC name for the following compound?

$$CH_3CH_2CH(CH_3$)CH_2CH_2CH_3$$

Accepted Answer

3-methylhexane

Question 10

Which of the following is the correct name for a molecule with three methyl groups attached to a decane chain at positions 2, 5, and 7?

Accepted Answer

2,5,7-trimethyldecane

Question 11

Which of the following is a correct statement about alkyl groups?

Accepted Answer

A propyl group has the formula $$CH_3CH_2CH_2-$$

Question 12

Which of the following is the correct IUPAC name for the compound with the following structure?

$$CH_3CH_2CH_2CH(CH_3$)CH_2CH_3$$

Accepted Answer

4-methylhexane

Question 13

A student is asked to name a compound with the following structure:

$$CH_3CH_2CH_2CH_2CH_2CH_3$$

What is the correct IUPAC name?

Accepted Answer

Hexane

Question 14

Which of the following is the correct structure for 4-isopropyloctane?

Accepted Answer

An eight-carbon chain with an isopropyl group on carbon 4

Question 15

Which of the following is the correct IUPAC name for a molecule with a five-carbon chain and a methyl group on the second carbon?

Accepted Answer

2-methylpentane

Question 16

Which of the following is a correct application of the IUPAC naming rules for alkanes?

Accepted Answer

Number the chain from the end nearest the first substituent.

Question 17

A molecule has the following structure:

$$CH_3CH_2CH(CH_3$)CH_2CH_2CH_3$$

What is the correct IUPAC name?

Accepted Answer

3-methylhexane

Question 18

Which of the following is the correct IUPAC name for a molecule with two ethyl groups on a hexane chain at positions 2 and 4?

Accepted Answer

2,4-diethylhexane

Question 19

Which of the following is the correct IUPAC name for a molecule with a butyl group on the fifth carbon of a decane chain?

Accepted Answer

5-butyldecane

Question 20

Which of the following is the correct IUPAC name for a molecule with a 1-ethyl-2-methylpropyl group attached to a main chain?

Accepted Answer

1-ethyl-2-methylpropyl

Structure and Nomenclature of Alkanes: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards