Question 1

Which of the following best describes the Markovnikov rule in the addition of HX to alkenes?

Accepted Answer

The hydrogen atom adds to the carbon with the greatest number of hydrogens, and the halide adds to the more substituted carbon.

Question 2

Which of the following is the major product when 1-butene reacts with HBr under thermodynamic control?

Accepted Answer

2-bromobutane

Question 3

What is the expected product when ethene reacts with water in the presence of acid?

Accepted Answer

Ethanol

Question 4

Which reagent is required for the anti addition of Br$$_2 to an $$alkene?

Accepted Answer

Br$$_2 in $$CCl$$_4$$

Question 5

Which of the following best describes the product of hydroboration-oxidation of 1-hexene?

Accepted Answer

Hexan-1-ol

Question 6

What is the major product when 2-butyne is treated with excess H$$_2 in $$the presence of a palladium catalyst?

Accepted Answer

butane

Question 7

Which of the following mechanisms is involved in the nitration of benzene?

Accepted Answer

Electrophilic aromatic substitution

Question 8

Which reagent is used for the oxidative cleavage of alkenes to form carboxylic acids and/or ketones?

Accepted Answer

KMnO$$_4 ($$hot, concentrated)

Question 9

What is the product of the reaction between acetylene and NaNH$$_2$$?

Accepted Answer

Acetylide ion

Question 10

Which of the following is a common activating group for electrophilic aromatic substitution?

Accepted Answer

-OH

Question 11

Which of the following is the correct order of reactivity for halogens in electrophilic aromatic substitution?

Accepted Answer

F \u003e Cl \u003e Br \u003e I

Question 12

What is the major product when benzene reacts with CH$$_3Cl $$and AlCl$$_3$$?

Accepted Answer

Toluene

Question 13

Which of the following is a correct statement about the hydration of alkynes?

Accepted Answer

It produces a ketone via tautomerization.

Question 14

Which of the following is the correct product of the bromination of cyclohexene?

Accepted Answer

trans-1,2-dibromocyclohexane

Question 15

Which of the following is a nucleophilic aromatic substitution reaction?

Accepted Answer

Reaction of chlorobenzene with NaOH at high temperature and pressure

Question 16

What is the expected product when 1-butyne reacts with excess Br$$_2$$?

Accepted Answer

1,1,2,2-tetrabromobutane

Question 17

Which of the following is a deactivating group for electrophilic aromatic substitution?

Accepted Answer

-NO$$_2$$

Question 18

Which of the following best describes the product of ozonolysis of 1-hexene followed by reductive workup?

Accepted Answer

Hexanal and ethanal

Question 19

Which of the following is the correct intermediate formed during the hydration of alkynes?

Accepted Answer

Enol

Question 20

Which of the following is the correct product when benzene reacts with SO$$_3$$ and H$$_2SO$_4$$?

Accepted Answer

Benzenesulfonic acid

Key Organic Reaction Mechanisms: Alkenes, Alkynes, and Aromatics (Chapters 13–15)

Study Guide - Practice Questions