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Carboxylic Acids

Total questions: 70

Worksheet time: 46mins

Name
Class
Date
1.

Which of these statements is FALSE regarding the following reaction?

a)

The reactant can be synthesized in a reaction between an alcohol and an acid chloride.

b)

The carbon-oxygen bond in the product is longer than the carbon-oxygen bond of the carbonyl in the reactant.

c)

The reactant has a lower pKa than the product.

d)

The product can react with SOCl2 to form 1-chloropropane

2.

Which is the correct IUPAC name of the following compound?

a)

A. 2-hydroxybutanoic acid

b)

B. 3-hydroxybutanoic acid

c)

C. 2-hydroxypropanoic acid

d)

D. 1-carboxypropan-2-ol

3.

Give the name for the below structure based on IUPAC nomenclature.

a)

A 2-methyl-4-butanoic acid

b)

B 2-methyl-4-pentanoic acid

c)

C 3-methylbutanoic acid

d)

D 3-methylpentanoic acid

4.

Which carboxylic acid is most acidic?

a)

CH3CH2CH2COOH

b)

CH3CH2CH(Cl)COOH

c)

CH3CH(Cl)CH2COOH

d)

ClCH2CH2CH2COOH

5.
How do you produce a carboxylic acid?
a)
Reducing a secondary alcohol or ketone
b)
Reducing a primary alcohol or aldehyde
c)
Oxidizing a primary alcohol or an aldehyde
d)
Oxidizing a secondary alcohol or a ketone
6.

The products of the reaction of a carboxylic acid and an alcohol would be

a)

Ketone and water

b)

Amide and water

c)

Acid chloride and water

d)

Ester and water

7.

Which reagent is commonly used to convert carboxylic acids into acid chlorides?

a)

HCl

b)

SOCl2

c)

Cl2

d)

CH3Cl

8.

2-butanol heated with acidified KMnO4 solution produced

a)

butanone

b)

butene

c)

butanoic acid

d)

butane

9.

What factor can decrease the solubility of carboxylic acid in water?

a)

The increase in length of the hydrocarbon chain.

b)

The decrease in length of the hydrocarbon chain.

c)

The increase in number of carboxyl group.

d)

The number of hydrogen bond.

10.

Choose the correct statement.

a)

Ethanoic acid is completely soluble in water because it can dimerise in the presence of water.

b)

Ethanoic acid is completely soluble in water because it has 2 carbon atoms.

c)

Ethanoic acid is completely soluble in water because it can form hydrogen bond and van der Waals forces with water molecules.

d)

Ethanoic acid is completely soluble in water because it has small hydrophobic group.

11.

Which of these molecules are named ethanoic acid

a)
b)
c)
d)
12.

What is the characteristic functional group of carboxylic acids?

a)

Carbonyl

b)

Hydroxyl

c)

Carbon

d)

Carboxyl

13.

What is the suffix for carboxylic acids?

a)

-di oic acid

b)

-oic acid

c)

-oic

14.

The name of this compound is:

a)

heptan-2-one

b)

2-hexanone

c)

pentanoic acid

d)

pentan-2-one

15.

The name of this compound is:

a)

heptan-2-one

b)

2-hexanone

c)

pentanoic acid

d)

pentan-2-one

16.

What is the correct IUPAC name for the Carboxylic Acid shown?

a)

1,1,1-trimethylbutanoic acid

b)

1,1,1-trimethylpentanoic acid

c)

4,4-dimethylbutanoic acid

d)

4,4-dimethylpentanoic acid

17.

What is the name of this compound?

a)

5-bromo-2-methylpentanoic acid

b)

1-bromo-4-methylpentanoic acid

c)

2-methyl-5-bromopentanoic acid

d)

1-bromopentanoic acid

18.

Name the molecule pictured here

a)

2,3,4-trifluorobutanoic acid

b)

1,2,3-trifluorobutanoic acid

c)

2,3,4-triflourobutanal

d)

1,2,3-trifluoropentanoic cid

19.
a)

A

b)

B

c)

C

d)

D

20.
a)

A

b)

B

c)

C

d)

D

21.
a)

A

b)

B

c)

C

d)

D

22.

What is a suitable chemical to convert propanol to propanoic acid?

a)

Manganese(IV) oxide

b)

Bromine water

c)

Acidified potassium manganate(VII)

23.

How can a carboxylic acid be made?

a)

By reducing an alcohol

b)

By combusting an alcohol

c)

By oxidising an alcohol

24.

Which is a test for a C=O?

a)

Bromine water

b)

Fehling's solution

c)

Acidified potassium dichromate (VI)

d)

2,4-DNPH (Brady's reagent)

25.

Which of the following tests would give a positive result for propan-1-ol?

a)

The iodoform test (NaOH + I2)

b)

Tollen's reagent (silver mirror test)

c)

PCl5 (phosphorus pentachloride)

d)

2,4-DNPH (Brady's reagent)

26.

Name this molecule:

a)

Propanone

b)

Propanal

c)

Butanone

d)

Butanal

27.

Name this molecule and give its functional group.

a)

Carboxylic acid - propanoic acid

b)

Ester - methyl ethanoate

c)

Ester - ethyl methanoate

d)

Carboxylic acid - methyl ethanoic acid

28.

Which of these can an ester be used for (select however many are correct)?

a)

As an oxidising agent

b)

In food flavourings

c)

In perfumes

d)

As a cleaning substance

29.

What will be formed if butanone is reacted with LiAlH4 in dry ether?

a)

Butanoic acid

b)

Butan-1-ol

c)

Butan-2-ol

d)

Butanal

30.

What is the name of the mechanism when KCN (in acidic conditions) reacts with propanal?

a)

Free radical substitution

b)

Nucleophilic substitution

c)

Nucleophilic addition

d)

Electrophilic addition

31.

Which of the following reagents will oxidise propan-1-ol to propanal (tick all that apply)?

a)

Acidified potassium dichromate (VI)

b)

2,4-DNPH (Brady's reagent)

c)

Fehling's solution

d)

PCl5 (phosphorus pentachloride)

32.

Reaction of a carboxylic acid and sodium hydroxide will produce:

a)

a substituted ammonium salt

b)

a substituted carbonate salt

c)

a substituted water

d)

a substituted carboxylate

33.

The reaction between HCOOH and CH3COOH produces an ester called methyl methanoate.

a)

True

b)

False

34.

Identify this type of structure

a)

Ester

b)

Ketone

c)

Aldehyde

d)

Carboxylic Acid

35.

The molecular formula of pentanoic acid is

a)

C5H11O2

b)

C5H9O2

c)

C5H10O2

d)

C5H12O2

36.

Ethanol reacts with ethanoic acid to form ethyl ethanoate.

C2H5OH + CH3COOH → CH3COOC2H5 + H2O

What is the formula of the ester formed when methanol reacts with butanoic acid, (C3H7COOH)?

a)

C2H5COOC2H5

b)

C3H7COOC2H5

c)

C3H7COOCH3

d)

CH3COOC3H7

37.

Which of the following acids does NOT exhibit optical isomerism?

a)

Lactic Acid

b)

Malic Acid

38.
Predict the product of the following reaction
a)
A
b)
B
c)
C
d)
D
39.

Choose the best reagent in the missing box for carrying out the following reaction

a)

PCC, CH2Cl2

b)

CH3MgBr in ether, then H3O+

c)

m-ClC6H4CO3H

d)

warm H2SO4/H2O

e)

NaOCH3, CH3OH

40.
Aldehyde reacts with Tollen's reagent forming:
a)
Yellow precipitate
b)
Brick-red precipitate
c)
Purple solution
d)
Silver mirror
41.
Which carboxylic acid and which alcohol came together to form the ester pictured here?
a)
Butanol and ethanoic acid
b)
Ethanol and butanoic acid
42.

Carboxylic acids are acids because... (select all correct answers)

a)

They will turn blue litmus paper red

b)

They will accept protons from water, forming OH-

c)

They will donate protons to water, forming H3O+

d)

React with equation R-COOH + H2O --> R-COO- + H3O+

43.

Which of the following is a substitution reaction of a carboxylic acid?

a)

Carboxylic Acid + H2O --> Carboxylate Ion + H3O+.

b)

Carboxylic Acid + Base --> Salt

c)

Carboxylic Acid + SOCl2 --> Acid Chloride + SO2 + HCl

d)

Carboxylic Acid + alcohol ---> Ester + H2O (in presence of H2SO4)

44.

Name this ester

a)

propyl ethanoate

b)

propyl propanoate

c)

butyl propanoate

d)

propyl butanoate

45.

Name the ester formed when Butan-1-ol reacts with propanoic acid.

a)

Propyl butanoate

b)

Butyl propanoate

c)

Butyl ethanoate

d)

Propyl ethanoate

46.

What do you think the name of this ester is?

a)

propyl ethyl-3-hexanoate

b)

Propyl hexanoate

c)

3-methylhexyl propanoate

d)

Propyl-3-methylhexanoate

47.

The general formula for an ester is:-

a)

A. ROR

b)

B. RCOR

c)

C. RCOOH

d)

D. RCOOR

48.

What is the general formula of the alkanes?

a)

CnH2n

b)

CnH2n+1

c)

CnH2n+2

d)

CnH2n+3

49.

What is the difference between aldehyde and ketones?

a)

position of C=O group

b)

position of C atoms

c)

the number of bonds carbon can form

d)

the number of oxygen atoms

50.

Carboxylic acids will react with...

a)

Metal carbonates

b)

Metals

c)

Bases

d)

Acids

51.

A weak acid is one which....

a)

partially dissociates

b)

completely ionizes

c)

totally dissolves

d)

has a higher pH

52.

Acidified potassium dichromate is an example of...

a)

an alkali

b)

a reducing agent

c)

a fuel

d)

an oxidising agent

53.

What catalyst is used in making esters?

a)

sodium hydroxide

b)

iron

c)

sulfuric acid

d)

lithium oxide

54.

alcohol + ? --> carboxylic acid

a)

hydrogen

b)

oxygen (oxidising agent)

c)

water

d)

carbon dioixde

55.

What is this skeletal formula showing?

a)

methyl 1-chloroethanoate

b)

methyl, 1-propanoate

c)

1-chloromethyl ethanoate

d)

1-chloromethyl methanoate

56.

What is the name of this ester?

a)

Ethyl Propanoate

b)

Ethyl ethanoate

c)

Propyl ethanoate

d)

Methyl ethanoate

e)

Propyl methanoate

57.
What reaction takes place when carboxylic acids are created by nitriles?
a)
oxidation
b)
hydration
c)
hydrolysis
d)
neutralization
e)
hydrogenation
58.
Ethanoic acid + propan-2-ol ->
a)
Ethyl Ethanoate
b)
prop-2-ly Ethanoate
c)
ethyl propyl ethanoate
d)
ethyl propanoate
e)
propyl propanoate
59.

Esterification can be described as ...

a)

An reaction where an acid and base swap functional groups

b)

A reaction where a carboxylic acid and base swap R groups

c)

A reaction between 2 esters

d)

A reaction where a base and alcohol swap R groups

e)

A reaction where a carboxylic acid and alcohol swap R groups

60.
What is the missing product from this word equation: ethanoic acid + sodium carbonate --> sodium ethanoate + water + ______
a)
Hydrogen
b)
Carbon monoxide
c)
carbon dioxide
d)
ethanol
e)
sodium hydroxide
61.
Which of these could be a catalyst for esterification?
a)
Iron
b)
Conc. sulfuric acid
c)
Platinum
d)
Ammonia
e)
Hydrogen peroxide
62.
What is the name of this ester?: CH3CH2CH(CH3)COOCH2CH2CH3
a)
Ethyl butanoate
b)
Ethyl 2-methylbutanoate
c)
Propyl 3-methylbutanoate
d)
Propyl butanoate
e)
Propyl 2-methylbutanoate
63.
Which of the following describes an acid hydrolysis reaction of esters ?
a)
It splits the acid into an aldehyde and an alcohol
b)
It splits the ester into an acid and water
c)
It splits the ester into POCl3 and HCL
d)
It splits the ester into an acid and an alcohol
64.
ester has ... functional group
a)
NH2
b)
COH
c)
COOH
d)
COO
e)
CO
65.
Which functional group is NOT present?
a)
Amino 
b)
Carboxyl 
c)
Hydroxyl
d)
Amine
66.
Classify the compound based on the functional group present.
a)
aldehyde
b)
ketone
c)
carboxylic acid
d)
ester
67.
Name the organic family for this structure:
a)
alkanes
b)
alkenes
c)
alkynes
d)
aromatics
68.

Is the carboxyl carbon always carbon number 1?

a)

Yes

b)

No

69.

Acid chlorides can be prepared from carboxylic acids by treatment with

a)

KCl

b)

(COCl)2

c)

SOCl2

d)

both (COCl)2 and SOCl2

70.

Diagram shows the conversion of molecule A through two different processes. Which of the following is molecule A and process II

a)

Molecule A : Ethanol Process II : Esterification

b)

Molecule A : Ethanol Process II : Oxidation

c)

Molecule A : Ethene Process II : Dehydration

d)

Molecule A : Ethanoic acid Process II : Esterification

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