Organic Chemistry

Question 1

Part of a molecule where most of its chemical reactions occur

A. Triple covalent
B. Double covalent
C. Functional group
D. Single covalent

Answer 1

C. Functional group

Question 2

When ethyl bromide is treated with sodium in dry ether, the product is

A. propane
B. butane
C. methylpropane
D. ethane

Answer 2

B. butane

Question 3

The following reagents will yield an alkyl halide from an alkene EXCEPT

A. Br2 in CCl4
B. HCl
C. HBr / peroxide
D. Br2 / UV or light

Answer 3

D. Br2 / UV or light

Question 4

Hydrogenation of alkenes in the presence of a poisoned palladium catalyst produces

A. alkyl halide
B. alkyne
C. alkane
D. alcohol

Answer 4

C. alkane

Question 5

How many isomers does xylene have?

A. 4
B. 3
C. 1
D. 2

Answer 5

B. 3

Question 6

No carbonyl group is found in

A. aldehyde
B. ether
C. carboxylic acid
D. ketone

Answer 6

B. ether

Question 7

Hydrogenation of one mole of allene (CH2=C=CH2) with 2 moles of H2 in the presence of Lindlar catalyst yields

A. propylene
B. 2-propene
C. 2-butene
D. propane

Answer 7

D. propane

Question 8

Which of the following is not an alipatic hydrocarbon?

A. toluene
B. n-tridecane
C. n-octane
D. propylene

Answer 8

A. toluene

Question 9

Friedel-Crafts acylation of benzene with acetyl chloride in 𝐴𝑙𝐶𝑙3 yields

A. chlorobenzene
B. acetophenone
C. cumene
D. benzaldehyde

Answer 9

B. acetophenone

Question 10

In the Grignard synthesis of an alkane using sec-butyl bromide, which of the following alkane will be produced?

A. none of these
B. isobutane
C. n-butane
D. isopentane

Answer 10

C. n-butane

Question 11

Which of the following contains sp-hybridized carbon?

A. C5H8
B. C4H8
C. C3H6
D. C6H12

Answer 11

A. C5H8

Question 12

Which of the following carbonyl compounds produces a secondary alcohol with 𝐿𝑖𝐴𝑙𝐻4?

A ketone
B. aldehyde
C. ester
D. carboxylic acid

Answer 12

A ketone

Question 13

Addition of methyl magnesium bromide to acetaldehyde produces

A. methanol
B. 2-propanol
C. ethanol
D. 1-propanol

Answer 13

B. 2-propanol

Question 14

Oxidation of isopropyl alcohol with 𝐾𝑀𝑛𝑂4 will yield

A. acetaldehyde
B. acetone
C. diethyl ether
D. acetic acid

Answer 14

B. acetone

Question 15

Reaction of alcohol and a carboxylic acid is known as ____________.

A. saponification
B. epoxidation
C. esterification
D. neutralization

Answer 15

C. esterification

Question 16

An unknown ester was hydrolyzed with water and acid to produce an acid, X and alcohol, Y. Oxidation of the alcohol with hot 𝐾𝑀𝑛𝑂4 yielded acid X. Oxidation of the alcohol produced acetaldehyde. Name the ester.

A. methyl propanoate
B. ethyl ethanoate
C. methyl ethanoate
D. ethyl benzoate

Answer 16

B. ethyl ethanoate

Question 17

No carbonyl group is found in

A. ketone
B. ester
C. epoxide
D. aldehyde

Answer 17

C. epoxide

Question 18

Carboxylic acids are reduced by lithium aluminum hydride to the corresponding

A. secondary alcohols
B. tertiary alcohols
C. primary alcohols
D. all of the choices

Answer 18

C. primary alcohols

Question 19

In Williamson synthesis of methyl isopropyl ether, the alcohol used is

A. isopropyl alcohol
B. methanol
C. ethanol
D. n-propyl alcohol

Answer 19

A. isopropyl alcohol

Question 20

2-methyl-2-butene undergoes hydrochlorination in the presence of benzoyl peroxide to form

A. 2-chloro-2-methylbutane
B. 1-chloro-3-methylbutane
C. 3-chloro-3-methylbutane
D. 2-chloro-3-methylbutane

Answer 20

D. 2-chloro-2-methylbutane

Markovnikov’s Rule because HBr is not present with the peroxide