Question 1

Which of the following compounds is a constitutional isomer of isobutane ($$\mathrm{C_4H_{10}}$$)?

Accepted Answer

n-butane

Question 2

Which of the following is the correct IUPAC name for the compound with the structure $$\mathrm{CH_3CH_2CH(CH_3$)CH_2CH_3}$$?

Accepted Answer

3-methylpentane

Question 3

Which of the following statements about boiling points is correct?

Accepted Answer

Branching in alkanes lowers the boiling point compared to their straight-chain isomers.

Question 4

Which of the following is the correct systematic name for the compound commonly known as 'isopropyl chloride'?

Accepted Answer

2-chloropropane

Question 5

A compound has the formula $$\mathrm{C_6H_{14}}. $$How many constitutional isomers are possible for this compound?

Accepted Answer

5

Question 6

Which of the following best describes a secondary alcohol?

Accepted Answer

The $$\mathrm{OH}$$ group is attached to a carbon bonded to two other carbons.

Question 7

Which of the following compounds can form hydrogen bonds with itself?

Accepted Answer

Ethanol ($$\mathrm{CH_3CH_2OH})$$

Question 8

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

$$\mathrm{CH_3CH_2CH_2CH_2Br}$$

Accepted Answer

1-bromobutane

Question 9

Which of the following statements about cyclohexane conformers is correct?

Accepted Answer

The chair conformer is more stable than the boat conformer due to minimized steric strain and angle strain.

Question 10

Which of the following is the correct systematic name for the compound with the structure $$\mathrm{CH_3CH_2OCH_3}$$?

Accepted Answer

Methoxyethane

Question 11

Which of the following best explains why tertiary amines cannot form hydrogen bonds with each other?

Accepted Answer

Tertiary amines lack N–H bonds necessary for hydrogen bonding.

Question 12

Which of the following is the correct IUPAC name for the compound with the structure $$\mathrm{CH_3CH_2CH_2NH_2}$$?

Accepted Answer

Propan-1-amine

Question 13

Which of the following statements about the physical properties of organic compounds is correct?

Accepted Answer

Symmetry increases the melting point of a compound.

Question 14

Which of the following is the correct IUPAC name for the compound with the structure $$\mathrm{CH_3CH_2CH_2OH}$$?

Accepted Answer

Propan-1-ol

Question 15

Which of the following is a correct statement about the solubility of organic compounds?

Accepted Answer

Polar compounds dissolve in polar solvents due to similar intermolecular forces.

Question 16

Which of the following is the most stable conformer of butane when viewed along the C2–C3 bond?

Accepted Answer

The anti conformer, where the two methyl groups are $$180^\circ$$ apart.

Question 17

Which of the following is the correct IUPAC name for the compound with the structure $$\mathrm{CH_3CH_2CH_2OCH_2CH_3}$$?

Accepted Answer

Ethoxypropane

Question 18

Which of the following is a correct statement about the classification of alkyl halides?

Accepted Answer

A secondary alkyl halide has the halogen attached to a carbon bonded to two other carbons.

Question 19

Which of the following is the correct IUPAC name for the compound with the structure $$\mathrm{CH_3CH_2CH_2CH_2NH_2}$$?

Accepted Answer

Butan-1-amine

Chapter 3: An Introduction to Organic Compounds – Nomenclature, Physical Properties, and Rotation About Single Bonds

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