Question 1

Which of the following is a defining feature of organic compounds?

Accepted Answer

They contain C–C and C–H bonds.

Question 2

Tetrachloroethane ($$\mathrm{C_2H_2Cl_4}) is $$classified as an organic compound. Which feature of this molecule makes it organic?

Accepted Answer

C–H bond

Question 3

Which of the following statements about the structural diversity of organic compounds is INCORRECT?

Accepted Answer

Carbon can form stable chains up to twelve atoms only.

Question 4

Which of the following compounds has the most branched structure?

Accepted Answer

C(CH$$_3$$)$$_4$$

Question 5

Why are molecular formulas insufficient for organic compounds?

Accepted Answer

They do not show the connectivity and orientation of atoms.

Question 6

Given the condensed formula CH$$_3(CH$_2$$)$$_3CH$_3$$, what is the structural formula for this molecule?

Accepted Answer

$$\mathrm{CH_3$-CH_2$-CH_2$-CH_2$-CH_3$}$$

Question 7

In a skeletal formula, what does each corner or endpoint represent?

Accepted Answer

A carbon atom

Question 8

What is the correct IUPAC name for the following alkane: $$\mathrm{CH_3CH_2CH_2CH_3}$$?

Accepted Answer

Butane

Question 9

Which of the following is the correct systematic name for the molecule shown below?

$$\mathrm{CH_3CH_2CH(CH_3$)CH_2CH_3}$$

Accepted Answer

2-methylpentane

Question 10

What is the correct condensed formula for the following structure?

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

Accepted Answer

CH$$_3CH$_2CH(CH$_3)CH$_2CH$_3$$

Question 11

Which alkane prefix corresponds to a molecule with 7 carbon atoms?

Accepted Answer

Hept-

Question 12

What is the correct systematic name for the following alkane with substituents: $$\mathrm{CH_3CH_2CH(CH_3$)CH_2CH_2CH_3}$$?

Accepted Answer

3-methylhexane

Question 13

Which of the following is the correct name for the alkyl group formed by removing a hydrogen from the second carbon of propane?

Accepted Answer

isopropyl

Question 14

What is the correct condensed formula for the following structure?

$$\mathrm{CH_3CH_2CH_2CH_2CH_2CH_3}$$

Accepted Answer

CH$$_3CH$_2CH$_2CH$_2CH$_2CH$_3$$

Question 15

Which of the following is the correct systematic name for a cycloalkane with a methyl group attached to carbon 1 and an ethyl group attached to carbon 2?

Accepted Answer

1-methyl-2-ethylcyclohexane

Question 16

When naming alkyl halides, how is a bromine atom attached to the third carbon of hexane indicated?

Accepted Answer

3-bromohexane

Question 17

Which of the following is the correct name for the compound with a phenyl group attached to the first carbon of heptane?

Accepted Answer

1-phenylheptane

Question 18

Which of the following is a tertiary butyl group?

Accepted Answer

A carbon attached to three other carbons

Question 19

Which of the following is the correct order for naming a branched alkane according to IUPAC rules?

Accepted Answer

location–substituent–parent

Introduction to Organic Chemistry: Structure, Nomenclature, and Representation

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