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esters

Total questions: 65

Worksheet time: 36mins

Name
Class
Date
1.

Esters are formed through what type of reaction?

a)

hydrolysis

b)

condensation

c)

hydration

d)

dehydration

2.

Name this compound

a)

propanol

b)

propanoic acid

c)

butanoic acid

d)

butanol

3.

A use for ester is...

a)

fuel

b)

additives in petrol

c)

flavourings

d)

hair dye

4.
What is the functional group shown?
a)
Alcohol
b)
Carboxylic Acid
c)
Ester
5.
The products of the reaction of carboxylic acid and an  primary alcohol in the presence of sulfuric acid are
a)
salt and water
b)
ester and water
c)
acid and a base
d)
smelly
6.
What is the function group shown?
a)
Alcohol
b)
Carboxylic Acid
c)
Ester
7.

Esters are known for......

a)

the bright colours

b)

flammability

c)

exploding

d)

fruity smell

8.

What catalyst is used in making esters?

a)

sodium hydroxide

b)

iron

c)

sulfuric acid

d)

lithium oxide

9.

What is this compound called?

a)

propyl ethanoate

b)

ethyl ethanoate

c)

ethyl propanoate

d)

methyl ethanoate

10.
Which carboxylic acid and which alcohol came together to form the ester pictured here?
a)
Butanol and ethanoic acid
b)
Ethanol and butanoic acid
11.

Name this functional group

a)

hydroxide

b)

hydroxyl

c)

carboxyl

d)

ester link

12.

A reaction where a large molecule is split up into smaller molecules by the addition of water is known as

a)

dehydration

b)

condensation

c)

hydration

d)

hydrolysis

13.

Name the ester produced from methanol and hexanoic acid

a)

methylhexanoic

b)

hexylmethanoate

c)

methylhexanoate

d)

hexanoatemethyl

14.

Name this ester

a)

Butyl ethanoate

b)

butyl methanoate

c)

ethyl ethanoate

d)

ethyl butanoate

15.

Give a use for carboxylic acids

a)

fuels

b)

cleaning products

c)

fragrances

d)

hair dye

16.

Name this ester

a)

Pentyl ethanoate

b)

Hexyl ethanoate

c)

Ethyl pentanoate

d)

Ethyl ethanoate

17.
Name the molecule pictured here
a)
2,3,4-trifluorobutanoic acid
b)
1,2,3-trifluorobutanoic acid
c)
2,3,4-triflourobutanoate
d)
1,2,3-trifluorobutanoate
18.

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

19.

Which structure represents a compound which has pH less than 7?

a)
b)
c)
d)
20.

Which equation represents the incomplete combustion of pentane, C5H12 ?

a)

2C5H12 + 11O2 → 10CO + 12H2O

b)

C5H12 + 8O2 → 5CO2 + 6H2O

c)

2C5H12 + 17O2 → 10CO + 24H2O

d)

C5H12 + 10O2 → 5CO2 + 12H2

21.

Which statement about homologous series is not correct?

a)

All homologous series are hydrocarbons.

b)

Members of a homologous series have the same functional group.

c)

Members of a homologous series have similar chemical properties.

d)

The alkanes are an example of a homologous series.

22.

Name the product of these reactions.


ethene + bromine → ___

ethene + steam → ___

a)

ethane, ethanol

b)

dibromoethane, ethanol

c)

ethanol, ethane

d)

ethanol, dibromoethane

23.

Which compounds have the same functional group?

a)

propanol and propanoic acid

b)

butane and butene

c)

ethane and propane

d)

butene and butanol

24.

Which compound below is unsaturated?

a)
b)
c)
d)
25.

When the alcohol ethanol reacts with the carboxylic acid propanol, an ester is formed. What is the name of this ester?

a)

ethyl propanoate

b)

propyl ethanoate

c)

ethyl ethanoate

d)

propyl propanoate

26.

Which statement about a molecule of ethene is correct?

a)

An ethene molecule has at least one double bond.

b)

It has C-H and C=O bonds.

c)

An ethene molecule has seven covalent bonds.

d)

Its bonds are formed by the transfer of electrons.

27.

Which compound decolourises bromine water?

a)

2-methyl butane

b)

propane

c)

cyclohexane

d)

hexene

28.

Why is ethanol a member of the homologous series of alcohols but propane is not?

a)

Ethanol has two carbon atoms per molecule but propane has three.

b)

Ethanol can be made from ethene but propane is obtained from petroleum.

c)

Ethanol is a liquid but propane is a gas.

d)

Ethanol contains the same functional group as other alcohols but propane does not.

29.

What is the gas produced by incomplete combustion?

a)

carbon monoxide

b)

hydrogen

c)

carbon dioxide

d)

sulfur dioxide

30.

Which two compounds are molecules which both contain double bond?

a)

ethane and ethanoic acid

b)

ethane and ethanol

c)

ethene and ethanoic acid

d)

ethene and ethanol

31.

What is the general formula of alcohol?

a)

CnH2nO

b)

CnH2n+2

c)

CnH2n

d)

CnH2n+1OH

32.

Which statements about aqueous ethanoic acid are correct?

a)

Ethanoic acid contains the functional group -COOH.

b)

Ethanoic acid reacts with carbonates to produce hydrogen.

c)

Ethanoic acid turns Universal Indicator paper blue.

d)

Ethanoic acid has a pH higher than pH 7.

33.

Which homologous series does belong to this compound?

a)

alcohols

b)

alkanes

c)

alkenes

d)

carboxylic acids

34.

What method of making ethanol by using this diagram?

a)

fermentation

b)

hydration

c)

substitution

d)

distillation

35.

What is this process called?

a)

Distillation

b)

Fractional Distillation

c)

Reverse Distillation

d)

Destructive Distillation

36.

This process is based of the fact that all compounds being separated have

a)

A boiling point

b)

Same boiling points

c)

Different boiling points

d)

No boiling points

37.
How does the temperature change from top to bottom?
a)
Increases
b)
Decreases
c)
It does not change
d)
Cannot be determined
38.
What does the viscosity of a hydrocarbon tell you?
a)
How easily it flows
b)
How easily it sets alight
c)
What its boiling point is
d)
How long the hydrocarbon is
39.
The longer the hydrocarbon, the ________ the flammability?
a)
Lower
b)
Higher
40.
How many carbon atoms are in methane?
a)
1
b)
2
c)
3
d)
4
41.
If an alkane has 20 carbon atoms, how many hydrogen atoms will it have?
a)
20
b)
22
c)
40
d)
42
42.

What chemical is this? (C5H10)

a)

Pentene

b)

Pentane

c)

Hexane

d)

Heptene

43.
Hydrocarbons are compounds that contain
a)
Carbon, only
b)
Carbon and Hydrogen, only
c)
Carbon, Oxygen, and Hydrogen, only
d)
Carbon, Oxygen, Hydrogen, and Nitrogen, only
44.
Cracking.....
a)
Breaks larger hydrocarbons into smaller hydrocarbons
b)
Separates hydrocarbons based on their length
c)
Detects alkenes
45.

Complete the equation C16H34 ---> __________ + C2H4

a)

C16H34

b)

C2H30

c)

C10H20

d)

C14H30

46.

When testing for alkenes (unsaturation) bromine water turns from...

a)

orange --> blue/black

b)

colourless --> pink

c)

orange --> colourless

d)

orange --> clear

47.

Compounds that are composed of the same number and type of atoms but have them arranged in different ways are ___________.

a)

isomers

b)

isotopes

c)

polymers

d)

alkanes

48.
Are the following molecules isomers?
a)
Yes
b)
No
49.
Are the following molecules isomers
a)
Yes
b)
No
50.
Melting and boiling points of alkanes
a)
increase with the number of carbon atoms in the chain
b)
decrease with the number of carbon atoms in the chain
c)
increase with branching
d)
are determined by the bonding between the carbons and hydrogens
51.

Oil fraction with the longest molecules

a)

refinery gases

b)

bitumen

c)

oil fuel

d)

diesel

52.

CH4 + O2 --> CO + 2H2O

a)

complete combustion

b)

incomplete combustion

53.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
54.
Which of the following elements must be present in any organic compound?
a)
Carbon
b)
Oxygen
c)
Potassium
d)
Hydrogen
55.

What is the structural formula of the hydrocarbon in the picture?

a)

C4H10

b)

CH3CH2CH2CH3

c)

C4H8

56.

What is the name of this alcohol?

(a)  

57.

Select all of these following that are methods to make ethanol.

a)

Dehydration of ethene

b)

Addition of water to ethene

c)

Fermentation of sugars with yeast

d)

Distillation of sugars

58.

Complete combustion of ethanol gives (a)   and water as the products

59.

Which statement is untrue of ethanol?

a)

It is a primary alcohol

b)

It is used as a fuel

c)

It contains a carboxyl group

d)

It is very volatile

60.

Homologous series has four features :

a)

Same functional group

b)

Same general formula

c)

Same chemical reaction

d)

Different physical properties

e)

All

61.

This structure belongs to the group called

a)

alkane

b)

alkene

c)

alcohol

d)

carboxylic acid

62.

What is a functional group?

a)

Group of atoms that give specific characteristics to a molecule

b)

Group of molecules that give specific characteristics to an atom

c)

Group of molecules that make up a group of atoms

d)

Group of atoms that give specific characteristics to an element

63.

Butane and pentane are in the same homologous series because

a)

they have the same general formula

b)

they are differ from each other by a -CH2 group.

c)

they can be prepared using similar methods.

d)

they have the same physical properties.

64.

Both pentane and pentene can react with bromine water under the presence of sunlight but they do not belong to the same homologous series because

a)

they have different molecular size

b)

their melting point and boiling point not the same

c)

they do not have the same functional group

d)

they differ from each other by a -H2 group in the molecular formula

65.
This compound belongs to the homologous group
a)
alkane
b)
amine
c)
alcohol
d)
acid

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