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IGCSE CHEMISTRY: ORGANIC CHEMISTRY

Total questions: 114

Worksheet time: 1hrs 18mins

Name
Class
Date
1.

What is this process called?

a)

Distillation

b)

Fractional Distillation

c)

Reverse Distillation

d)

Destructive Distillation

2.

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

3.
How does the temperature change from top to bottom?
a)
Increases
b)
Decreases
c)
It does not change
d)
Cannot be determined
4.
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
5.
The longer the hydrocarbon, the ________ the flammability?
a)
Lower
b)
Higher
6.
The longer the hydrocarbon, the _________ the viscosity?
a)
Lower
b)
Higher
7.
How many carbon atoms are in methane?
a)
1
b)
2
c)
3
d)
4
8.
If an alkane has 20 carbon atoms, how many hydrogen atoms will it have?
a)
20
b)
22
c)
40
d)
42
9.
Which formula represents a saturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
10.
Which formula represents an unsaturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
11.

What chemical is this? (C5H10)

a)

Pentene

b)

Pentane

c)

Hexane

d)

Heptene

12.
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
13.
Cracking.....
a)
Breaks larger hydrocarbons into smaller hydrocarbons
b)
Separates hydrocarbons based on their length
c)
Detects alkenes
14.
What liquid detects the presence of an alkene?
a)
Alkene water
b)
Bromine water
c)
Water
d)
Limewater
15.

Complete the equation C16H34 ---> __________ + C2H4

a)

C16H34

b)

C2H30

c)

C10H20

d)

C14H30

16.

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

a)

orange --> blue/black

b)

colourless --> pink

c)

orange --> colourless

d)

orange --> clear

17.

Alkenes have the general formula:

a)

CnH2n

b)

CnH2n+1

c)

CnH2n+2

d)

CnHn

18.

Alkanes have the general formula:

a)

CnH2n

b)

CnH2n+1

c)

CnH2n+2

d)

CnHn

19.

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

20.
A structural isomer of pentane is?
a)
2,2-dimethyl octane
b)
2-methyl butane
c)
1-methyl propane
d)
1-methyl pentane
21.
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
22.
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
23.

Fill in the blank:

What are the Reactants of the combustion reaction?


_______ + _______ --> CO2 + H2O + Energy

a)

Carbon Dioxide (CO2) + Water (H2O)

b)

Fuel (C2H6) + Oxygen (O2)

c)

Carbon Dioxide (CO2) + Oxygen (O2)

d)

Fuel (C2H6) + Water (H2O)

24.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
25.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
26.
How many carbon atoms are in propane
a)
1
b)
2
c)
3
d)
4
27.
The "ane" ending in "alkane" tells someone that they are dealing with _________-bonded carbons.
a)
single
b)
double
c)
triple
d)
quadruple
28.
What is the general formula of an alkane
a)
2n+2
b)
CnH2n+2
c)
CnH2n
d)
CnHn
29.
What is the exam definition of saturated?
a)
No single bonds
b)
Contains a double bond
c)
No single bonds, all double bonds
d)
No double bonds, all single bonds
30.
Which formula represents an unsaturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
31.
What is the correct definition for a hydrocarbon?
a)
A compound made of hydrogen and carbon
b)
A mixture made of hydrogen and carbon only
c)
A mixture made of only hydrogen and carbon
d)
A compound made of only hydrogen and carbon
32.
What is kerosene used for?
a)
Fuel for ships
b)
Fuel for lorries
c)
Fuel for airplanes
d)
Making roads
33.

Fuel for ships and lorries

a)

kerosene

b)

petrol

c)

bitumen

d)

fuel oil

34.

For surfacing roads and roofs

a)

petrol

b)

bitumen

c)

fuel oil

d)

kerosene

35.

Oil fraction with the longest molecules

a)

refinery gases

b)

bitumen

c)

oil fuel

d)

diesel

36.

Oil fraction with the shortest molecules

a)

refinery gases

b)

bitumen

c)

oil fuel

d)

diesel

37.

Oil fraction with the highest boiling point

a)

refinery gases

b)

bitumen

c)

oil fuel

d)

diesel

38.

Oil fraction with the lowest boiling point

a)

refinery gases

b)

bitumen

c)

oil fuel

d)

diesel

39.

The most viscous oil fraction

a)

fuel oil

b)

diesel

c)

bitumen

d)

kerosene

40.

The darkest oil fraction

a)

fuel oil

b)

diesel

c)

bitumen

d)

kerosene

41.

Saturated hydrocarbon

a)

no carbon-carbon double bonds

b)

at least one carbon-carbon double bond

42.

You add bromine water to a saturated hydrocarbon. The bromine water:

a)

stays the same (remains orange/brown)

b)

goes colourless

43.

You add bromine water to an unsaturated hydrocarbon. The bromine water:

a)

stays the same (remains orange/brown)

b)

goes colourless

44.

CH4 + 2O2 --> CO2 + 2H2O

a)

complete combustion

b)

incomplete combustion

45.

CH4 + O2 --> CO + 2H2O

a)

complete combustion

b)

incomplete combustion

46.

When plenty of oxygen is available

a)

complete combustion

b)

incomplete combustion

47.

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

48.

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

49.

One of the main disadvantages of plastic is

a)

its non-biodegradability

b)

its high availability

c)

that its cheap

d)

that its durable

50.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
51.

What term describes alkene molecules that contain a C=C double bond?

a)

saturated

b)

unsaturated

52.

Molecules collected at the bottom of the fractionating column tend to be...

a)

more viscous, less flammable and less volatile

b)

less viscous, more flammable and more volatile

c)

more viscous, more flammable and less volatile

d)

less viscous, less flammable and more volatile

53.

What type of formula is represented in this picture?

a)

molecular formula

b)

displayed formula

c)

structural formula

54.

CH3CH2CH2CH3

a)

molecular formula

b)

displayed formula

c)

structural formula

55.

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

a)

C4H10

b)

CH3CH2CH2CH3

c)

C4H8

56.

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

a)

C4H10

b)

CH3CH2CH2CH3

c)

C4H8

57.

Which letter/letters represent unsaturated hydrocarbons?

a)

A

b)

B

c)

C

d)

E

e)

F

58.

Which letter would turn bromine water colourless?

a)

A

b)

B

c)

C

d)

D

e)

F

59.

Which letter represents propane?

a)

A

b)

B

c)

C

d)

D

e)

F

60.

Which letter represents propene?

a)

A

b)

B

c)

C

d)

D

e)

F

61.

Which number represents polymerisation?

a)

1

b)

2

c)

3

d)

4

62.

Process 4 is called

a)

cracking

b)

fractional distillation

c)

polymerisation

d)

combustion

63.

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

a)

CH4

b)

C2H4

c)

C3H6

d)

C4H8

64.

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

65.

What functional group is -OH

a)

Hydroxyl

b)

Carboxyl

c)

Amino

d)

Carbonyl Ketone

66.
Classify the compound based on the functional group present.
a)
carboxylic acid
b)
aldehyde
c)
alcohol
d)
ether
67.

Classify the compound based on the functional group present.

a)

aldehyde

b)

ketone

c)

alcohol

d)

carboxyl

68.
Classify the compound based on the functional group present.
a)
alkane
b)
alkene
c)
alkyne
d)
aromatic
69.

Identify the functional groups present in this compound.

a)

amine

b)

amide

c)

ether

d)

ester

70.
How is a Carboxyl Group commonly written?
a)
-OH
b)
 -COOH
c)
-COH
d)
-CHOH
71.

Large molecules made up of small monomers are called

a)

polymers

b)

monomer

c)

allotrope

d)

functional group

72.

Small molecules that make up larger molecules

a)

polymer

b)

monomer

c)

allotrope

d)

functional group

73.

Which type of polymerisation uses only one monomer?

a)

addition polymerisation

b)

condensation polymerisation

74.

Which type of polymerisation uses two different monomers, both contain a functional group at each end?

a)

addition polymerisation

b)

condensation polymerisation

75.

What is made when a dicarboxylic acid reacts with a diol?

a)

a polyamide

b)

a polyester

c)

an evaporation polymer

d)

a condensation polymer

76.

-COOH is the functional group for...

a)

alcohols

b)

esters

c)

carboxylic acids

d)

amides

77.

-COO is the functional group for...

a)

alcohols

b)

esters

c)

carboxylic acids

d)

amides

78.

-OH is the functional group for...

a)

alcohols

b)

esters

c)

carboxylic acids

d)

amides

79.

An alcohol can be __________________ to form a carboxylic acid

a)

oxidised

b)

reduced

c)

polymerised

d)

broken down

80.

Acidified potassium dichromate is an example of...

a)

an alkali

b)

a reducing agent

c)

a fuel

d)

an oxidising agent

81.

Name this carboxylic acid

a)

ethanoic acid

b)

prpoanoic acid

c)

butyl butanoate

d)

butanoic acid

82.

Name this ester

a)

ethyl ethanoate

b)

propyl ethanoate

c)

methyl ethanoate

d)

ethyl methanoate

83.

What catalyst is used in making esters?

a)

sodium hydroxide

b)

iron

c)

sulfuric acid

d)

lithium oxide

84.

alkene + ? --> alcohol

a)

hydrogen

b)

oxygen

c)

water

d)

carbon dioixde

85.

alcohol + ? --> carboxylic acid

a)

hydrogen

b)

oxygen (oxidising agent)

c)

water

d)

carbon dioixde

86.

carboxylic acid + ? --> ester

a)

water

b)

alkene

c)

alcohol

d)

alkane

87.

Name the polymer formed from this monomer

a)

chloroethene

b)

chloroethane

c)

dichloroethene

d)

dichloroethane

88.

Name the monomer that forms this polymer

a)

ethane

b)

ethanol

c)

ethene

d)

methene

89.

True or false? A catalyst is required for the hydration of ethene.

a)

True

b)

False

90.
The molecular formula for Heptane is
a)
C4H10
b)
C8H18
c)
C5H12
d)
C7H16
91.
How many carbon atoms are in propane
a)
1
b)
2
c)
3
d)
4
92.
The "ane" ending in "alkane" tells someone that they are dealing with _________-bonded carbons.
a)
single
b)
double
c)
triple
d)
quadruple
93.
Give the name of this compound...
C3H8
a)
Propene
b)
Butane
c)
Butene
d)
Propane
94.
How many hydrogen atoms are in butane
a)
4
b)
6
c)
8
d)
10
95.
Which one of the following is saturated?
a)
water
b)
C4H8
c)
C4H10
d)
C5H8
96.
Which of the following generally undergoes substitution reactions
a)
alkanes
b)
alkenes
c)
Alkanes and alkenes 
d)
algebras
97.
At which pipe: M or N are hydrocarbons with lower boiling points collected?
a)
M
b)
N
98.

Hydrocarbons burning is an example of what type of chemical reaction ?

a)

neutralisation

b)

endothermic

c)

addition

d)

exothermic

99.

C5H12 + Br2 --> C5H11Br + HBr

This reaction is called____________________.

a)

Substitution

b)

Addition

c)

Cracking

d)

Combustion

100.

What is the general formula for an alcohol?

a)

CnH2nOH

b)

CnH2n+1OH

c)

CnH2n+2OH

101.

Which is the correct structural formula for ethanol?

a)
b)

C2H5OH

c)

CH3CH2OH

d)

C2H6O

102.

Which diagram shows the displayed formula for propanol?

a)
b)
c)

CH3CH2CH2OH

d)

C3H7OH

103.

Select the best conditions for fermentation of glucose:

a)

20oC with yeast, in an open flask

b)

20oC with yeast, in a flask with a valve attached

c)

30oC with yeast, in an open flask

d)

30oC with yeast, in a flask with a valve attached

104.

What is made when ethanoic acid reacts with sodium hydroxide?

a)

sodium chloride and water

b)

sodium ethanoate

c)

sodium ethanoate and carbon dioxide

d)

sodium ethanoate and water

105.

What is the name of the ester formed when methanoic acid reacts with propanol?

a)

Methyl propanoate

b)

Propyl methanoate

c)

Methanoic propylate

d)

Not enough information to answer the question

106.

An ester that smells of pineapple is ethyl hexanoate. What is the name of the alcohol is needed to make this ester?

a)

Ethanol

b)

Hexanol

c)

Not enough information to answer the question.

107.

Give the IUPAC name of this molecular formula C6H14

a)

Hexane

b)

Hexanol

c)

Hexanoic Acid

d)

Hexanal

108.

When the HBr is added to propene the product/ products formed is/are

a)

2-bromopropane

b)

Propanamine

c)

1- bromopropane

d)

2-bromopropane and 1- bromopropane

109.

Reagent needed to change an alcohol to an alkene

a)

concentrated H2SO4

b)

KOH (alc)

c)

water/dilute H2SO4

d)

Cr2O72-/H+

110.

Which of the following prefixes represents "7"?

a)

prop-

b)

but-

c)

hept-

d)

pent-

111.

Carbon has an atomic number of ____, with _____, valence electrons.

a)

16; 4

b)

4; 2

c)

6; 4

d)

12; 2

112.

molecule with the same molecular structure but different structural formula

a)

fats

b)

lipids

c)

fossil fuels

d)

isomers

113.

the name of this compaund C4H10

a)

METHANE

b)

HEXENE

c)

BUTANOIC ACID

d)

BUTANE

114.

The group made up of alcohols and acids

a)

esters

b)

carbocilic acids

c)

ethers

d)

alkynes

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