Question 1

Which of the following statements correctly describes the difference between SN1 and SN2 mechanisms for alkyl halide substitution reactions?

Accepted Answer

SN1 reactions involve a two-step mechanism with a carbocation intermediate, while SN2 reactions proceed via a single concerted step.

Question 2

Which reagent would you use to oxidize a primary alcohol to an aldehyde without further oxidation to a carboxylic acid?

Accepted Answer

PCC (Pyridinium chlorochromate)

Question 3

What is the major product when 2-bromopropane reacts with NaOH in ethanol under reflux?

Accepted Answer

Propene

Question 4

Which of the following statements about the reactivity of alkyl halides is correct?

Accepted Answer

Primary alkyl halides are more reactive in SN2 reactions than tertiary alkyl halides.

Question 5

Which of the following is the correct IUPAC name for the compound CH$$_3CH$_2CH$_2OH$$?

Accepted Answer

Propanol

Question 6

A student oxidizes 2-butanol with KMnO$$_4. $$What is the expected major product?

Accepted Answer

2-butanone

Question 7

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

Accepted Answer

tert-butanol

Question 8

What is the product of the reaction between an aldehyde and NaBH$$_4$$?

Accepted Answer

Primary alcohol

Question 9

Which of the following statements about NMR spectroscopy is correct?

Accepted Answer

Protons attached to electronegative atoms appear downfield (higher ppm) in the NMR spectrum.

Question 10

Which reagent would you use to reduce a ketone to a secondary alcohol?

Accepted Answer

NaBH$$_4$$

Question 11

A student wants to synthesize tert-butyl alcohol from 2-methylpropene. Which reagent should be used?

Accepted Answer

H$$_2O/H$_2SO$_4$$

Question 12

Which of the following is a correct statement about the oxidation of secondary alcohols?

Accepted Answer

Secondary alcohols are oxidized to ketones.

Question 13

Which of the following is the correct product when 1-butanol is treated with PCC?

Accepted Answer

Butanal

Question 14

Which of the following statements about the radical halogenation of alkanes is correct?

Accepted Answer

Bromination is more selective and produces more substituted products than chlorination.

Question 15

Which of the following is the correct order of reactivity for the reduction of carbonyl compounds with NaBH$$_4$$?

Accepted Answer

Aldehydes \u003e ketones \u003e esters \u003e carboxylic acids

Question 16

Which of the following best explains why tertiary alcohols are resistant to oxidation by PCC?

Accepted Answer

Tertiary alcohols lack a hydrogen atom on the carbon bearing the hydroxyl group.

Question 17

Which of the following is a correct statement about the use of protecting groups in alcohol chemistry?

Accepted Answer

Protecting groups are used to prevent unwanted reactions at the alcohol functional group during multi-step synthesis.

Question 18

Which of the following is the correct product when an aldehyde reacts with Grignard reagent followed by acidic workup?

Accepted Answer

Secondary alcohol

Question 19

A student is analyzing the NMR spectrum of ethanol. Which splitting pattern would be observed for the methyl protons?

Accepted Answer

Triplet

Question 20

Which of the following statements about resonance in organic molecules is correct?

Accepted Answer

Resonance stabilizes carbocations by delocalizing positive charge.

Organic Chemistry Study Guide: Alkyl Halides, NMR Spectroscopy, and Alcohols

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