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IGCSE ORGANIC CHEMISTRY 2

Total questions: 110

Worksheet time: 1hrs 21mins

Name
Class
Date
1.
Hydrocarbons are compounds that contain
a)
  Carbon and Nitrogen
b)
Carbon and Hydrogen 
c)
  Carbon, and Oxygen
d)
Carbon, Oxygen, and  Hydrogen 
2.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
3.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
4.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
5.

What is the general formula of the alkenes?

a)

CnH2n+1

b)

CnH2n+2

c)

CnH2n

d)

CnH2n+1OH

6.

Which of the following is an unsaturated hydrocarbon?

a)

C2H6

b)

C3H8

c)

C4H8

d)

C4H10

7.

What is the homologous series for propene?

a)

alkanes

b)

alkenes

c)

alkynes

d)

aromatics

8.

What color does bromine water turn in the presence of an alkene?

a)

Orange

b)

Blue

c)

Colorless

d)

Green

9.

An alkane can be described as:

a)

Saturated

b)

Unsaturated

c)

Mysterious

d)

Totes kewl

10.

If an alkene reacts with a halogen (such as bromine), it is known as what type of reaction?

a)

Addition

b)

Condensation

c)

Polymerisation

d)

Hydrogenation

11.

An atom or group of atoms which are responsible for the reactions of a particular compound are known as what:

a)

Functional Group

b)

Homologous Series

c)

Polymerisation

d)

Gradation

12.

What is formed during the combustion of an organic substance assuming we have enough oxygen present?

a)

carbon monoxide

b)

water

c)

carbon dioxide

d)

hydrogen

13.

What is the term given to the process by which longer chain hydrocarbons are broken down into shorter length alkanes, alkenes, and possibly hydrogen?

a)

fractional distillation

b)

evaporation

c)

cracking

d)

polymerisation

14.

What two conditions are needed for cracking?

a)

high temperature

b)

high pressure

c)

catalyst

d)

low temperature

15.

C10H22 --> C5H12 + C3H6 + ?

a)

C2H4

b)

C3H4

c)

CO2

d)

CH4

16.

What color does bromine water turn in the presence of an alkane?

a)

Orange

b)

Blue

c)

Colorless

d)

Green

17.

When an alkene reacts with steam in the presence of a catalyst, what is produced?

a)

alkane

b)

alcohol

c)

carboxylic acid

d)

poly(alkene)

18.
What is the general formula of an alkane
a)
2n+2
b)
CnH2n+2
c)
CnH2n
d)
CnHn
19.
Name the compound.
a)
hexane
b)
2,3-dimethylbutane
c)
ethylbutane
d)
2,2-dimethylbutane
20.
Classify the compound based on the functional group present.
a)
alkane
b)
alkene
c)
alkyne
d)
aromatic
21.

Select the formula for the following name: Octene

a)

C8H16

b)

C8H14

c)

C8H18

d)

C8H15OH

22.
Which formula represents a saturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
23.

What is the observation obtained when alkene react with acidified KMnO4

a)

decolourize purple solution

b)

decolourize reddish brown solution

c)

decolourize blue solution

d)

yellow precipitate formed

24.

When heat is applied to a hydrocarbon and it melts, the energy is being used to...

a)

Break covalent bonds

b)

Overcome intermolecular forces

c)

Break a molecule

d)

Separate atoms

25.

What is the functional group of alcohols?

a)

–NH2

b)

–COOH

c)

–CHO

d)

–OH

e)

–NO2

26.
The type of alcohol in alcoholic beverages is called
a)
fermentation
b)
detoxification
c)
ethanol
d)
vodka
27.

Name this compound...

a)

methane

b)

methene

c)

methanol

d)

methoxymethane

28.

alkene + ? --> alcohol

a)

hydrogen

b)

oxygen

c)

water

d)

carbon dioixde

29.

Which process makes ethanol through anaerobic respiration of yeast?

a)

Filtration

b)

Intoxication

c)

Fermentation

d)

Distillation

30.

If an alkene is reacted with steam and a catalyst, what is made?

a)

An acid

b)

An alkene

c)

An alkane

d)

An alcohol

31.

CH3CH2OH is the formula of which alcohol?

a)

Methanol

b)

Ethanol

c)

Propanol

d)

Butanol

32.

CH3CH2CH2CH2OH is the formula of which alcohol?

a)

Methanol

b)

Ethanol

c)

Propanol

d)

Butanol

33.

CH3CH2COOH is called

a)

Ethanoic acid

b)

Propane

c)

Propanol

d)

Propanoic acid

34.

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

a)

ethyl methanoate

b)

methyl methanoate

c)

methyl ethanoate

d)

ethyl ethanoate

35.

What is the name of this molecule

a)

butanoic acid

b)

butyl propanoate

c)

propyl butanoate

d)

propanol

36.

What chemical 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

37.

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

a)

hydrogen

b)

carbon dioxide

c)

oxygen

d)

chlorine

38.

What is the role of sulfuric acid in the reaction to make esters?

a)

weak acid

b)

hydrogen ion acceptor

c)

catalyst

d)

partially ionises

39.

Esters have distinctive sweet smells, and are volatile liquids. What does volatile mean?

a)

flows easily

b)

catches fire easily

c)

evaporates easily

d)

colours easily

40.

Name this compound

a)

propanol

b)

propanoic acid

c)

butanoic acid

d)

butanol

41.
What is the function group shown?
a)
Alcohol
b)
Carboxylic Acid
c)
Ester
42.

What is this compound called?

a)

propyl ethanoate

b)

ethyl ethanoate

c)

ethyl propanoate

d)

methyl ethanoate

43.

Esters are formed through what type of reaction?

a)

hydrolysis

b)

condensation

c)

hydration

d)

dehydration

44.

What gas is produced when magnesium reacts with ethanoic acid?

a)

hydrogen

b)

carbon dioxide

c)

oxygen

d)

chlorine

45.

Complete the word equation for the reaction:

ethanoic acid + potassium carbonate → _________ ________+ carbon dioxide + water

(a)  

46.

Ethanoic acid is described as a weak acid. Explain what this means in terms of ionisation

a)

fully ionised

b)

partially ionised

c)

deionised

47.

What process is used to separate crude oil in hydrocarbons with different chain lengths?

a)

distillation

b)

fractional distillation

c)

cracking

d)

polymerisation

48.

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

49.

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

50.

Molecules collected at the top 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

51.

A fraction of crude oil is made up of:

a)

Hydrocarbons of similar chain lengths

b)

Numbers

c)

Large hydrocarbons

d)

Alkenes only

52.

Crude oil is made up of:

a)

Ethane

b)

Butane

c)

A mixture of different hydrocarbons

d)

Extremely large hydrocarbons which are broken up once extracted

53.

What process happens at each level in the fractionating column?

a)

Evaporation

b)

Condensation

c)

Combustion

54.

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

a)

Evaporation

b)

Condensation

c)

Combustion

55.

Where do short chain hydrocarbons collect?

a)

At the top

b)

In the middle

c)

At the bottom

56.

Where do long chain hydrocarbons collect?

a)

At the top

b)

In the middle

c)

At the bottom

57.

Shorter hydrocarbons have:

a)

Higher boiling points

b)

Lower boiling points

58.
Petroleum and natural gas form from...
a)
strong winds
b)
cooled magma
c)
radioactive materials
d)
remains of plants and animals 
59.
How does the temperature change from top to bottom?
a)
Increases
b)
Decreases
c)
It does not change
d)
Cannot be determined
60.
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
61.
The longer the hydrocarbon, the ________ the flammability?
a)
Lower
b)
Higher
62.
The longer the hydrocarbon, the _________ the viscosity?
a)
Lower
b)
Higher
63.
What is kerosene used for?
a)
Fuel for ships
b)
Fuel for lorries
c)
Fuel for airplanes
d)
Making roads
64.

Used in gas stoves

a)

kerosene

b)

fuel oil

c)

bitumen

d)

refinery gas

65.

The most viscous fraction

a)

kerosene

b)

fuel oil

c)

bitumen

d)

refinery gas

66.

The most flammable fraction

a)

kerosene

b)

fuel oil

c)

bitumen

d)

refinery gas

67.

Fuel for ships

a)

fuel oil

b)

petroleum

c)

diesel

d)

bitumen

68.

Fuel for lorries

a)

fuel oil

b)

petroleum

c)

diesel

d)

bitumen

69.

For surfacing roads

a)

bitumen

b)

refinery gas

c)

petroleum

d)

diesel

70.

Fraction with the highest boiling point

a)

bitumen

b)

refinery gas

c)

petroleum

d)

diesel

71.
Which of the following compounds is an example of hydrocarbon?
a)
CO2
b)
C2H6
c)
C2H5OH
d)
CH3COOH
72.

Which compound belongs to the alkene family?

a)

C2H2

b)

C2H4

c)

C6H6

d)

C6H14

73.
Classify the compound based on the functional group present.
a)
carboxylic acid
b)
aldehyde
c)
alcohol
d)
ether
74.

A homologous series is a family of organic compounds with

a)

similar chemical properties and same general formula

b)

similar chemical properties and different general formula

c)

different chemical properties and same general formula

d)

similar physical properties and same general formula

75.

Each member of a homologous series differs from the next by a

a)

–CH2 group

b)

–CH group

c)

–CO2 group

d)

–CH4 group

76.

State the general formula for alkene

a)

CnH2n+2

b)

CnH2n

c)

CnH2n+1

d)

CnH2n-2

77.

Which are the following are all alkanes?

a)

methane, ethane, propane

b)

methane, ethene, propene

c)

methene, ethene, propene

d)

ethene, propene, butene

78.

Which are the following are all alkenes?

a)

methane, ethane, propane

b)

methane, ethene, propene

c)

methene, ethene, propene

d)

ethene, propene, butene

79.

Alkanes react with excess oxygen to form

a)

carbon dioxide and water vapour

b)

salt and water

c)

carbon monoxide and soot

d)

metal hydroxide and hydrogen

80.

An alkane is

a)

polyunsaturated

b)

polysaturated

c)

saturated

d)

unsaturated

81.

Alkanes undergo substitution by chlorine only in the presence of

a)

UV light

b)

oxygen

c)

water

d)

aqueous bromine

82.

What are the conditions for cracking?

a)

solid catalyst of aluminium oxide and silicon dioxide, at 600oC

b)

nickel catalyst at 200oC

c)

nickel catalyst at 600oC

d)

solid catalyst of aluminium oxide and silicon dioxide, at 200oC

83.

Which of the following statements about cracking is not true?

a)

Cracking is the breakdown of large alkane molecules into small molecules.

b)

Cracking is used to produce fuel for motor vehicles.

c)

Cracking is used to produce H2 and alkenes.

d)

Cracking takes place in the presence of sunlight.

84.

Which of the following shows the structure of propene?

a)
b)
c)
d)
85.

Which of the following shows the structure of ethane?

a)
b)
c)
d)
86.
a)
addition
b)
combustion
c)
double replacement
d)
substitution
87.
a)
fermentation
b)
combustion
c)
saponification
d)
substitution
88.
a)
addition
b)
polymerization
c)
esterification
d)
fermentation
89.
a)
fermentation
b)
addition
c)
polymerization
d)
combustion
90.
a)
substitution
b)
addition
c)
polymerization
d)
fermentation
91.
a)
combustion
b)
addition
c)
substitution
d)
esterification
92.

Homologous series has four features :

a)

Same functional group

b)

Same general formula

c)

Same chemical reaction

d)

Different physical properties

e)

All

93.

Homologous series ?

a)

Heptane

b)

Metylhexena

c)

Butane

d)

Propene

94.

Different features classified as homologous series

a)

General formula

b)

Chemical reaction

c)

Functional group

d)

Physical properties

95.

Which of the following alcohols has the highest boiling point?

a)

Butanol

b)

Pentanol

c)

Hexanol

d)

Heptanol

96.

What is the general formula for alcohols?

a)

CnH2n

b)

CnH2n+2

c)

CnH2n+1OH

d)

CnH2n+1COOH

97.

The following equation represents the preparation of ethanol in industry.

What is the process?

a)

Oxidation

b)

Hydration

c)

Fermentation

d)

Hydrogenation

98.

Which of the following process can transform pentene to pentane?

a)

Oxidation

b)

Reduction

c)

Fermentation

d)

Hydrogenation

99.

Which of the following hydrocarbons contains only single bonds?

a)

Alkanes

b)

Alkenes

c)

Alkynes

100.

Which of the following is a flammable solid that can be used as a fuel for electricity generation or heating?

a)

Methane

b)

Petroleum

c)

Natural gas

d)

Coal

101.

Given the formula representing a compound:


Which formula represents an isomer of this compound?

a)
b)
c)
d)
102.

Which compound is an isomer of C2H5OC2H5?

a)

CH3COOH

b)

C2H5COOCH3

c)

C3H7COCH3

d)

C4H9OH

103.

Given the structural formulas:


Which two formulas represent compounds that are isomers of each other?

a)

A and B

b)

A and C

c)

B and D

d)

C and D

104.

Which compound has an isomer?

a)
b)
c)
d)
105.

Which compound is an isomer of CH3CH2OH?

a)

CH3COOH

b)

CH3CH2CH3

c)

CH3OCH3

d)

CH3COCH3

106.

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

107.

A structural isomer of pentane is?

a)

2,2-dimethylbutane

b)

2-methylbutane

c)

1-methylpropane

d)

1-methylpentane

108.
Propane has no structural isomers
a)
True
b)
False
109.
alkene is:
a)
hydrocarbon with a double bond
b)
hydrocarbon with a triple bond
c)
a hydrocarbon with one or more benzene rings
d)
organic compound with single bonds
110.

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

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