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IGCSE CHEMISTRY: ORGANIC CHEMISTRY 2

Total questions: 125

Worksheet time: 1hrs 26mins

Name
Class
Date
1.

To which homologous series does this hydrocarbon belong?

a)

Alkanes

b)

Alkenes

c)

Alkynes

d)

Alcohols

2.

Check all that apply: Which of the following molecules are ISOMERS?

a)

A and B

b)

A and C

c)

C and D

d)

B and D

3.

Which of the following molecules is an example of an unsaturated hydrocarbon?

a)

A

b)

B

c)

C

d)

D

4.

What is the IUPAC name of this hydrocarbon? *IUPAC is the naming system taught in class.

a)

1-butene

b)

2-butene

c)

1-pentyne

d)

2-pentyne

5.

To which class of organic compound does this molecule belong?

a)

halide

b)

ether

c)

alcohol

d)

amide

6.

What is the IUPAC name of this organic molecule?

a)

3-chlorobutane

b)

2-chlorobutane

c)

3-chloropentane

d)

2-chloropentane

7.

This reaction is an example of which type of organic reaction?

a)

addition

b)

fermentation

c)

polymerization

d)

substitution

8.

This reaction is an example of which type of organic reaction?

a)

addition

b)

fermentation

c)

polymerization

d)

substitution

9.

What is a hydrocarbon?

a)

A compound that contains Hydrogen and carbon

b)

A compound that contains Hydrogen and carbon only

c)

A fuel that contains hydrogen and carbon

d)

A misture of Carbon and water

10.

What does the following sentence describe:

A compound in which there are only single bonds between the atoms in the molecule

a)

Saturated compound

b)

Polar compound

c)

Flamable compound

d)

Aromatic compound

11.

This molecule is an example of an

a)

Alkene

b)

Alkyne

c)

Alkane

d)

Alcohol

12.

Name this molecule

a)

Methane

b)

Ethane

c)

Propane

d)

Butane

13.

This molecule is an example of

a)

A saturated compound

b)

An unsaturated compound

c)

A molecule with hydrogen bonds

d)

A molecule with a very low octane number

14.

Which of the following is the general formula for the alkanes

a)

CnH2n+2

b)

CnH2n

c)

CnHn

d)

CH4

15.

As the chain length of an alkane increases, the boiling point.....

a)

Increases

b)

Decreases

c)

Is not affected

16.

The molecules in the example are examples of

a)

Isomers

b)

Isotopes

c)

Alkenes

d)

Alkynes

17.

The molecule shown is an isomer of:

a)

Butane

b)

Butene

c)

Propene

d)

Propane

18.

Name the molecule shown

a)

Heptane

b)

Octane

c)

2,3-dimethylpentane

d)

Pentane

e)

3,4-dimethylpentane

19.

To which homologous series does this hydrocarbon belong?

a)

Alkanes

b)

Alkenes

c)

Alkynes

d)

Alcohols

20.

What is the IUPAC name of this hydrocarbon? *IUPAC is the naming system taught in class.

a)

1-butene

b)

2-butene

c)

1-pentyne

d)

2-pentyne

21.

What is the IUPAC name of this organic molecule?

a)

3-chlorobutane

b)

2-chlorobutane

c)

3-chloropentane

d)

2-chloropentane

22.

Which of these are alkanes?

a)

Methane

b)

Ethene

c)

C2H6C_2H_6  

d)

C2H4C_2H_4  

23.

How many carbons does butane have?

a)

1

b)

2

c)

3

d)

4

24.

What is the general formula of an alkane?

a)

C4H10C_4H_{10}  

b)

CnH(2n)C_nH_{\left(2n\right)}  

c)

Cn H(2n+2)C_n\ H_{\left(2n+2\right)}  

d)

C2nH2nC_{2n}H_{2n}  

25.

Which of these is the displayed formula of butane?

a)

C4H10C_4H_{10}  

b)

CH2CH_2  

c)
d)
26.

Which of these is the empirical formula of butane?

a)

C4H10C_4H_{10}  

b)

CH2CH_2  

c)
d)
27.

What is an alkene?

a)

A hydrocarbon with double bonds

b)

An unsaturated hydrocarbon

c)

A saturated hydrocarbon

d)

A hydrocarbon without double bonds

28.

What is the general formula of an alkene?

a)

C4H10C_4H_{10}  

b)

CnH(2n)C_nH_{\left(2n\right)}  

c)

Cn H(2n+2)C_n\ H_{\left(2n+2\right)}  

d)

C2nH2nC_{2n}H_{2n}  

29.

What kind of reactions do alkenes do?

a)

Substitution

b)

Addition

c)

Neutralisation

d)

Explosions

30.

When bromine water is added to an alkene what do we see?

a)

The bromine water remains orange

b)

the solution turns cloudy

c)

A squeaky pop

d)

The bromine water decolorises (orange to colorless)

31.

Crude oil is a mixture of hydrocarbons. What property do we use to separate them?

a)

Boiling point

b)

Colour

c)

Flammability

d)

Filtration

32.

What is kerosene used for?

a)

Cars

b)

Planes

c)

Roads

d)

Power stations

33.

What is produced when a hydrocarbon is burned?

a)

Carbon dioxide and hydrogen

b)

Carbon dioxide

c)

Oxygen and Chlorine

d)

Carbon dioxide and water

34.

What happens to the viscosity as we increase the number of carbons?

a)

Increases

b)

Decreases

35.

What happens to the boiling point as we increase the number of carbons?

a)

Increases

b)

Decreases

36.

Which is a dangerous product of incomplete combustion?

a)

Carbon dioxide

b)

Carbon monoxide

c)

Water

d)

Hydrogen

37.

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

38.

What functional group is -OH

a)

Hydroxyl

b)

Carboxyl

c)

Amino

d)

Carbonyl Ketone

39.
Classify the compound based on the functional group present.
a)
carboxylic acid
b)
aldehyde
c)
alcohol
d)
ether
40.

Classify the compound based on the functional group present.

a)

alkane

b)

alkene

c)

alkyne

41.

Classify the compound based on the functional group present.

a)

aldehyde

b)

ketone

c)

alcohol

d)

carboxyl

42.
Classify the compound based on the functional group present.
a)
alkane
b)
alkene
c)
alkyne
d)
aromatic
43.

Classify the compound based on the functional group present.

a)

alkane

b)

alkene

c)

alkyne

d)

aromatic

44.
How is a Carboxyl Group commonly written?
a)
-OH
b)
 -COOH
c)
-COH
d)
-CHOH
45.
Classify the compound based on the functional group present.
a)
alkane
b)
alkene
c)
alkyne
d)
aromatic
46.

Large molecules made up of small monomers are called

a)

polymers

b)

monomer

c)

allotrope

d)

functional group

47.

Small molecules that make up larger molecules

a)

polymer

b)

monomer

c)

allotrope

d)

functional group

48.

Hydrocarbons, the simplest family of carbon compounds, are made from these two elements:

a)

Hydrogen and Copper

b)

Helium and Carbon

c)

Hydrogen and Carbon

49.

Pentane is an alkane with____ carbon atoms

a)

3

b)

5

c)

15

d)

50

50.

Name the compound CH4

(a)  

51.

Name the compound CH2=CH2

(a)  

52.
How many carbon atoms are in ethane?
a)
1
b)
2
c)
3
d)
4
53.
How many carbon atoms are in methane?
a)
1
b)
2
c)
3
d)
4
54.
Which of the following elements must be present in any organic compound?
a)
Carbon
b)
Oxygen
c)
Potassium
d)
Hydrogen
55.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
56.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
57.

What is fractional distillation?

a)

a process used to separate crude oil

b)

a process used to burn up fuels

c)

a way to make different products

d)

how oil is extracted from the ground

58.

What is fractional distillation?

a)

a process used to separate crude oil

b)

a process used to burn up fuels

c)

a way to make different products

d)

how oil is extracted from the ground

59.

Fractional distillation separates crude oil based on the different __________ of the molecules in the mixture

a)

melting point

b)

boiling point

c)

freezing point

d)

chemical reactivity

60.

A fraction of crude oil is made up of:

a)

Hydrocarbons of similar chain lengths

b)

Numbers

c)

Large hydrocarbons

d)

Alkenes only

61.

What process happens at each level in the fractionating column?

a)

Evaporation

b)

Condensation

c)

Combustion

62.

What process happens as the crude oil enters the fractionating column?

a)

Evaporation

b)

Condensation

c)

Combustion

63.

Where do short chain hydrocarbons collect?

a)

At the top

b)

In the middle

c)

At the bottom

64.

Where do long chain hydrocarbons collect?

a)

At the top

b)

In the middle

c)

At the bottom

65.

Shorter hydrocarbons have:

a)

Higher boiling points

b)

Lower boiling points

66.

Is this hydrocarbon saturated or unsaturated?  HINT: Look at the bonds.

a)
saturated
b)
unsaturated
67.
What is the process of breaking down a long hydrocarbon into smaller hydrocarbons
a)
Cracking
b)
Fracking
c)
Combustion
d)
Distillation
68.
What are the products of cracking?
a)
Bromine water
b)
Short alkanes and alkenes
c)
Branched alkenes
d)
Alkanes only
69.
What is the colour change when an alkene reacts with bromine water?
a)
Turns clear
b)
Turns orange
c)
From colourless to orange
d)
From orange to colourless
70.
What does an alkene have that an alkane does not?
a)
Electrons
b)
Oxygen
c)
Double C=C bond
d)
Single C-C bond
71.

Hydrocarbon that contains at least one carbon-carbon double covalent bond.

a)

alkane

b)

alkene

c)

alkyne

72.
How does the temperature change from top to bottom?
a)
Increases
b)
Decreases
c)
It does not change
d)
Cannot be determined
73.
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
74.
The longer the hydrocarbon, the ________ the flammability?
a)
Lower
b)
Higher
75.
The longer the hydrocarbon, the _________ the viscosity?
a)
Lower
b)
Higher
76.
Which formula represents a saturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
77.
Which formula represents an unsaturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
78.

What chemical is this? (C5H10)

a)

Pentene

b)

Pentane

c)

Hexane

d)

Heptene

79.

Complete the equation C16H34 ---> __________ + C2H4

a)

C16H34

b)

C2H30

c)

C10H20

d)

C14H30

80.

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

81.
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
82.
Why carbon can form long chains while other elements can't.
a)
because carbon is the most unstable nonmetal elements
b)
carbon can form 4 covalent bonds and become very stable
c)
carbon is the most abundant element on the surface of our planet
d)
every organic compound contains carbon
83.
The "ane" ending in "alkane" tells someone that they are dealing with _________-bonded carbons.
a)
single
b)
double
c)
triple
d)
quadruple
84.
What is kerosene used for?
a)
Fuel for ships
b)
Fuel for lorries
c)
Fuel for airplanes
d)
Making roads
85.

Oil fraction with the longest molecules

a)

refinery gases

b)

bitumen

c)

oil fuel

d)

diesel

86.

For surfacing roads and roofs

a)

petrol

b)

bitumen

c)

fuel oil

d)

kerosene

87.

Oil fraction with the highest boiling point

a)

refinery gases

b)

bitumen

c)

oil fuel

d)

diesel

88.

The darkest oil fraction

a)

fuel oil

b)

diesel

c)

bitumen

d)

kerosene

89.

CH4 + O2 --> CO + 2H2O

a)

complete combustion

b)

incomplete combustion

90.

Carbon monoxide is a colourless, odourless toxic gas. It

is poisonous because it reduces the capacity of blood to

transport:

a)

carbon dioxide

b)

nitrogen

c)

oxygen

d)

water vapour

91.

What is a polymer?

a)

a very light material that is highly flammable

b)

a fossil fuel

c)

a large molecule made from many monomers joined together

d)

a molecule made up of only polar bonds

92.

What type of formula is represented in this picture?

a)

molecular formula

b)

displayed formula

c)

structural formula

93.

CH3CH2CH2CH3

a)

molecular formula

b)

displayed formula

c)

structural formula

94.

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

a)

C4H10

b)

CH3CH2CH2CH3

c)

C4H8

95.

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

a)

C4H10

b)

CH3CH2CH2CH3

c)

C4H8

96.

Which letter would turn bromine water colourless?

a)

A

b)

B

c)

C

d)

D

e)

F

97.

Which letter represents propene?

a)

A

b)

B

c)

C

d)

D

e)

F

98.

Which number represents polymerisation?

a)

1

b)

2

c)

3

d)

4

99.

Ethene is an unsaturated hydrocarbon. What is the molecular formula of ethene?

a)

CH4

b)

C2H4

c)

C3H6

d)

C4H8

100.
Classify the compound based on the functional group present.
a)
carboxylic acid
b)
aldehyde
c)
alcohol
d)
ether
101.

Alkane to halogenoalkane

a)

excess oxygen and heat

b)

halogen at room temperature

c)

halogen and UV light

d)

hydrogen halide at room temperature

102.

Alkane to carbon dioxide and water

a)

excess oxygen and heat

b)

limited oxygen and heat

c)

halogen and UV light

d)

water, warm mixture

103.

The products of incomplete combustion of a hydrocarbon are

a)

carbon dioxide and water

b)

water only

c)

carbon monoxide

d)

carbon monoxide and water

104.

A series of compounds with the same functional group is called

a)

homologous series

b)

structural isomers

c)

alkanes

d)

functional group

105.

Alkanes are

a)

unsaturated hydrocarbons

b)

saturated hydrocarbons

c)

polymers

d)

monomers

106.

Thermal cracking is when

a)

a slight pressure and high temperature with a zeolite catalyst produces aromatic hydrocarbons and motor fuels

b)

a high pressure and high temperature produce a high percentage of alkenes

c)

initiation, propogation and termination occur.

d)

polymers are made

107.

Esters are formed through what type of reaction?

a)

hydrolysis

b)

condensation

c)

hydration

d)

dehydration

108.

Name this compound

a)

propanol

b)

propanoic acid

c)

butanoic acid

d)

butanol

109.
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
110.
What is the function group shown?
a)
Alcohol
b)
Carboxylic Acid
c)
Ester
111.

Esters are known for......

a)

the bright colours

b)

flammability

c)

exploding

d)

fruity smell

112.

What catalyst is used in making esters?

a)

sodium hydroxide

b)

iron

c)

sulfuric acid

d)

lithium oxide

113.

What is this compound called?

a)

propyl ethanoate

b)

ethyl ethanoate

c)

ethyl propanoate

d)

methyl ethanoate

114.

The functional groups shown from left to right are

a)

hydroxyl, carboxyl, ester

b)

carboxyl, hydroxyl, ester

c)

ester, carboxyl, hydroxyl

d)

hydroxyl, ester, carboxyl

115.

Esters are formed from a reaction between

a)

two carboxylic acids.

b)

an alkane and an alcohol.

c)

an alkane and a carboxylic acid.

d)

an alcohol and a carboxylic acid.

116.

Which reagents would you use to make the following molecule?

a)

methanol and propanoic acid

b)

methanoic acid and butanol

c)

methanol and butanoic acid

d)

methanol acid and propanol

117.

The name of the ester shown is

a)

ethyl pentanoate

b)

pentyl ethanoate

c)

methyl hexanoate

d)

hexyl methanoate

118.

The number of carbon atoms in propyl butanoate is

a)

3

b)

4

c)

7

d)

6

119.

The ester shown can be made by reacting

a)

ethanol and propanol.

b)

ethanoic acid and propanoic acid.

c)

ethanol and propanoic acid.

d)

propanol and ethanoic acid.

120.

How can a carboxylic acid be made?

a)

By reducing an alcohol

b)

By combusting an alcohol

c)

By oxidising an alcohol

121.

Which ester would be made by reacting ethanoic acid and methanol together....

a)

ethyl methanoate

b)

methyl methanoate

c)

methyl ethanoate

d)

ethyl ethanoate

122.

What gas is produced when potassium carbonate reacts with ethanoic acid?

a)

hydrogen

b)

carbon dioxide

c)

oxygen

d)

chlorine

123.

Name this compound...

a)

methane

b)

methene

c)

methanol

d)

methoxymethane

124.

Choose the correct IUPAC name of the structural formula shown in the diagram.

a)

but-1-ol

b)

butan-1-ol

c)

but-1-ene

d)

butan-1-ene

125.

Which is not the isomer of pentanol?

a)
b)
c)
d)

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