Question 1

Which of the following statements best explains why alcohols generally have higher boiling points than alkyl halides of similar molecular weight?

Accepted Answer

Alcohols can form hydrogen bonds, which are stronger than the dipole-dipole interactions in alkyl halides.

Question 2

Which of the following compounds is classified as a vicinal dihalide?

Accepted Answer

$$\mathrm{CH_2ClCH_2Cl}$$

Question 3

What is the IUPAC name for the following compound?

(See $$image_17)
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Accepted Answer

4-bromo-5-ethyl-2-methylheptane

Question 4

Which of the following best describes the rate-determining step in the SN1 reaction of cyclopentanol with HBr?

Accepted Answer

Carbocation formation

Question 5

Which of the following is the best leaving group for an SN2 reaction?

Accepted Answer

$$\mathrm{I^-}$$

Question 6

Which solvent would most effectively increase the rate of an SN2 reaction involving a primary alkyl halide and a strong nucleophile?

Accepted Answer

Acetone

Question 7

Which of the following statements about nucleophilicity and basicity is correct?

Accepted Answer

Nucleophilicity is determined by the rate of attack on an electrophilic carbon, while basicity is determined by the equilibrium constant for proton abstraction.

Question 8

Which of the following alcohols will react fastest with HBr to form an alkyl bromide?

Accepted Answer

tert-butanol

Question 9

What is the major product of the reaction between 1-methylcyclohexanol and HBr?

Accepted Answer

1-bromomethylcyclohexane

Question 10

Which of the following best explains why fluorinated hydrocarbons such as Teflon are used as non-stick coatings?

Accepted Answer

Fluorine's low polarizability decreases the strength of intermolecular forces, making the surface non-stick.

Question 11

Which of the following is the correct order of increasing SN1 reactivity for the C$$_5H$_{12}O $$alcohols I-III?

Accepted Answer

I, II, III

Question 12

Which of the following best describes the stereochemical outcome of an SN1 reaction at a stereogenic center?

Accepted Answer

A racemic mixture or partial racemization due to attack from either side of the planar carbocation

Question 13

Which of the following is the least able to serve as a nucleophile in a chemical reaction?

Accepted Answer

$$\mathrm{NH_3$}$$

Question 14

Which of the following best describes a geminal dihalide?

Accepted Answer

A compound with two halogens on the same carbon

Question 15

Which of the following is a correct statement about the effect of polar protic solvents on nucleophilicity?

Accepted Answer

Polar protic solvents decrease the nucleophilicity of small anions due to strong solvation.

Question 16

Which of the following is the best description of a nucleophile?

Accepted Answer

A species that donates a pair of electrons to form a new covalent bond

Question 17

Which of the following is the correct IUPAC name for isobutyl alcohol?

Accepted Answer

2-methylpropan-1-ol

Question 18

Which of the following is a primary alcohol?

Accepted Answer

$$\mathrm{CH_3CH_2CH_2OH}$$

Question 19

Which of the following is the best explanation for why tertiary alcohols react faster with hydrogen halides than primary alcohols?

Accepted Answer

Tertiary carbocations formed during the reaction are more stable than primary carbocations.

Question 20

Which of the following is a correct statement about the SN2 reaction mechanism?

Accepted Answer

It is favored by primary alkyl halides and strong nucleophiles.

Alkyl Halides and Alcohols: Nucleophilic Substitution – Structure, Properties, and Mechanisms

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