Question 1

What is the correct IUPAC name for the following compound?

$$\mathrm{CH_3$-CH_2$-CH_2$-CH(CH_2CH_3)-CH_2$-CH(CH_3$)-CH_3$}$$

Accepted Answer

4-ethyl-2-methylheptane

Question 2

According to IUPAC rules, what is the first step in naming an alkane?

Accepted Answer

Write the alkane name of the longest chain of carbon atoms.

Question 3

Which of the following is the correct IUPAC name for a molecule with a six-carbon chain, a methyl group on carbon 2, and an ethyl group on carbon 4?

Accepted Answer

4-ethyl-2-methylhexane

Question 4

What is the general formula for an alkane?

Accepted Answer

$$C_nH_{2n+2}$$

Question 5

Which of the following statements about alkanes is TRUE?

Accepted Answer

Alkanes are non-polar and insoluble in water.

Question 6

A compound has the formula $$C_5H_{12}. $$Which class of hydrocarbon does it belong to?

Accepted Answer

Alkane

Question 7

What is the IUPAC name for the following structure?

$$\mathrm{CH_3$-CH_2$-CH(CH_3$)-CH_2$-CH_3$}$$

Accepted Answer

2-methylpentane

Question 8

Which of the following is the correct IUPAC name for a molecule with a five-carbon chain and two methyl groups on carbons 2 and 3?

Accepted Answer

2,3-dimethylpentane

Question 9

Which of the following is the correct IUPAC name for a compound with a five-carbon chain, a methyl group on carbon 2, and a chloro group on carbon 3?

Accepted Answer

3-chloro-2-methylpentane

Question 10

Which of the following is the correct IUPAC name for the compound shown below?

$$\mathrm{CH_3CH_2C(Br)_2CH_3}$$

Accepted Answer

2,2-dibromobutane

Question 11

Which of the following is the correct IUPAC name for a compound with a seven-carbon chain, methyl groups on carbons 3 and 5, and a fluoro group on carbon 3?

Accepted Answer

3,5-difluoro-3-methylheptane

Question 12

Which of the following is the correct IUPAC name for a compound with a five-carbon chain and a double bond starting at carbon 2?

Accepted Answer

2-pentene

Question 13

Which of the following is the correct IUPAC name for a compound with a four-carbon chain, a triple bond starting at carbon 1, and a methyl group on carbon 3?

Accepted Answer

3-methyl-1-butyne

Question 14

Which of the following is a property shared by alkanes, alkenes, and alkynes?

Accepted Answer

They are all non-polar and soluble in non-polar solvents.

Question 15

Which of the following is the correct IUPAC name for a compound with an eight-carbon chain, an ethyl group on carbon 5, and a methyl group on carbon 3?

Accepted Answer

5-ethyl-3-methyloctane

Question 16

Which of the following is the correct IUPAC name for a compound with a five-carbon chain, a double bond starting at carbon 2, and a methyl group on carbon 4?

Accepted Answer

4-methyl-2-pentene

Question 17

Which of the following is the correct IUPAC name for a compound with a five-carbon chain, a triple bond starting at carbon 2, and a bromo group on carbon 4?

Accepted Answer

4-bromo-2-pentyne

Question 18

Which of the following is the correct IUPAC name for a compound with an eight-carbon chain, methyl groups on carbons 2 and 6, and a double bond starting at carbon 3?

Accepted Answer

2,6-dimethyl-3-octene

Question 19

Which of the following is the correct IUPAC name for a compound with a six-carbon ring and a methyl group attached to carbon 1?

Accepted Answer

1-methylcyclohexane

Introduction to Organic Chemistry: Hydrocarbons and Nomenclature

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