Alcohols, Phenols and Ethers; Aldehydes and Ketones

Question 1

Identify the correct statement with respect to the oxygen found in an alcohol as compared to the oxygen found in an ether.

Select one:

a. Oxygen is identical in both these compounds; the difference between them is determined by another factor
b. Oxygen in an alcohol is directly associated with a hydrogen; the oxygen in an ether is not chemically bound to a hydrogen
c. Oxygen is similar in both compounds as it is always found on a terminal carbon
d. The oxygen in an ether is found on a side chain and that of the alcohol is not

Answer 1

b. Oxygen in an alcohol is directly associated with a hydrogen; the oxygen in an ether is not chemically bound to a hydrogen

Question 2

Which of the following would be only very slightly soluble in water?

Select one:

a. 1-propanol
b. 2-propanol
c. 1.5-pentanediol
d. 1-hexanol

Answer 2

d. 1-hexanol

Question 3

Which compound would have the highest boiling point?

Select one:

a. CH3-O-CH2-CH2-CH3
b. CH3-CH2-CH2-CH2-CH3
c. CH3-CH2-CH2-CH2-OH
d. CH3-CH2-O-CH2-CH3

Answer 3

c. CH3-CH2-CH2-CH2-OH

Question 4

Which of the following alcohols would be the most difficult to oxidize?

Select one:

a. CH3C(OH)(CH3)2
b. CH3CH(OH)CH2(CH3)2
c. CH3OH
d. HOCH2CH2OH

Answer 4

a. CH3C(OH)(CH3)2

Question 5

The alcohol present in alcoholic beverages is

Select one:

a. methyl alcohol
b. ethyl alcohol
c. denatured alcohol
d. wood alcohol

Answer 5

b. ethyl alcohol

Question 6

Ethers generally have boiling points _____ those of comparable alcohols.

Select one:

a. above
b. about the same as
c. below

Answer 6

c. below

Question 7

Oxidation of a thiol produces a

Select one:

a. salt
b. aldehyde
c. ketone
d. disulfide

Answer 7

d. disulfide

Question 8

Which of the following compounds would you expect to be foul smelling?

Select one:
a. CH3-CH2-CH2-OH
b. CH3-CH2-CH2-SH 
c. CH3-CH2-CH2-CH3
d.

Answer 8

b. CH3-CH2-CH2-SH

Question 9

Dehydration of an alcohol will produce?

Select one:

a. an alcohol
b. an ether
c. either an alkene or ether depending on the reaction conditions
d. a ketone

Answer 9

c. either an alkene or ether depending on the reaction conditions

Question 10

Thiols create the unpleasant odor associated with a skunk. Which of the general forms below represents a thiol?

Select one:

a. R-S2-R
b. R-SH2
c. R-SH
d. R-S-R

Answer 10

c. R-SH

Question 11

What is the group that distinguishes alcohols from other classes of compounds?

Select one:

a. carboxyl
b. carbonyl
c. hydroxy
d. amide

Answer 11

c. hydroxy

Question 12

What structural characteristic is shared by the aldehydes and the ketones?

Select one:

a. They both are straight chain compounds
b. Both of these compound classes have as the smallest compound a 5 carbon skeleton
c. Aldehydes and ketones both contain a carbonyl carbon
d. Aldehydes and ketones have no shared characteristics

Answer 12

c. Aldehydes and ketones both contain a carbonyl carbon

Question 13

In the IUPAC nomeclature system, the name of which of the following would end in -al?

Select one:

a. an alcohol
b. an aldehyde
c. an alkane
d. a phenol

Answer 13

b. an aldehyde

Question 14

The name 4,5-dichlorocyclohexanone should be

Select one:

a. 1,2- dichlorocyclohexanone
b. 2,3- dichlorocyclohexanone
c. 3,4- dichlorocyclohexanone
d. 4,5-dichlorocyclohexanone

Answer 14

c. 3,4- dichlorocyclohexanone

Question 15

Assuming that molecular weights are comparable, which of the following compounds would you expect to be the highest boiling?

Select one:

a. aldehyde
b. alkene
c. alcohol
d. ketone

Answer 15

c. alcohol

Question 16

Which of the following products is formed when hydrogen is reacted with 3-methyl-2-butanone?

Select one:

a. a primary alcohol
b. a secondary alcohol
c. a tertiary alcohol
d. an acetal

Answer 16

b. a secondary alcohol

Question 17

A positive Benedict’s test is indicated by the formation of:

Select one:

a. Cu2O
b. Cu
c. Cu2+
d. a metallic mirror

Answer 17

a. Cu2O

Question 18

Predict the resultant compound class when an aldehyde is hydrogenated

Select one:

a. hemiketal
b. alcohol
c. carboxylic acid
d. no reaction

Answer 18

b. alcohol

Question 19

To what class of compounds does glucose belong?

Select one:

a. cyclic ketone
b. cyclic aldehyde
c. cyclic hemiacetal
d. acid

Answer 19

c. cyclic hemiacetal

Question 20

Hemiacetals are?

Select one:

a. produced on the oxidation of a carboxylic acid
b. result of the reaction between an aldehyde and a ketone
c. are produced when an ether reacts with a ketone
d. the unstable product of the oxidation of an aldehyde

Answer 20

d. the unstable product of the oxidation of an aldehyde

Question 21

The result of a hydrolysis reaction is

Select one:

a. getting the chemicals involved wet
b. causing oxidation-reduction reaction resulting in hydration
c. splitting a molecule into the component reactants
d. one that results in an alcohol

Answer 21

c. splitting a molecule into the component reactants

Question 22

Which of the following is an aldehyde flavoring agent?

Select one:

a. biacetyl
b. menthol
c. vanillin
d. camphor

Answer 22

c. vanillin