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Organic 1 revision

Total questions: 106

Worksheet time: 1hrs 5mins

Name
Class
Date
1.
How many carbon atoms are in methane?
a)
1
b)
2
c)
3
d)
4
2.
If an alkane has 20 carbon atoms, how many hydrogen atoms will it have?
a)
20
b)
22
c)
40
d)
42
3.
The longer the hydrocarbon, the _________ the viscosity?
a)
Lower
b)
Higher
4.
The longer the hydrocarbon, the ________ the flammability?
a)
Lower
b)
Higher
5.
How does the temperature change from top to bottom?
a)
Increases
b)
Decreases
c)
It does not change
d)
Cannot be determined
6.
Are the following molecules isomers
a)
Yes
b)
No
7.
Are the following molecules isomers?
a)
Yes
b)
No
8.
A structural isomer of pentane is?
a)
2,2-dimethyl octane
b)
2-methyl butane
c)
1-methyl propane
d)
1-methyl pentane
9.
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
10.
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
11.
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
12.

Alkenes have the general formula:

a)

CnH2n

b)

CnH2n+1

c)

CnH2n+2

d)

CnHn

13.

Alkanes have the general formula:

a)

CnH2n

b)

CnH2n+1

c)

CnH2n+2

d)

CnHn

14.
Which formula represents a saturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
15.
Which formula represents an unsaturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
16.

What chemical is this? (C5H10)

a)

Pentene

b)

Pentane

c)

Hexane

d)

Heptene

17.
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
18.
Cracking.....
a)
Breaks larger hydrocarbons into smaller hydrocarbons
b)
Separates hydrocarbons based on their length
c)
Detects alkenes
19.
What liquid detects the presence of an alkene?
a)
Alkene water
b)
Bromine water
c)
Water
d)
Limewater
20.

Complete the equation C16H34 ---> __________ + C2H4

a)

C16H34

b)

C2H30

c)

C10H20

d)

C14H30

21.

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

a)

orange --> blue/black

b)

colourless --> pink

c)

orange --> colourless

d)

orange --> clear

22.

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)

23.

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

24.

What is this process called?

a)

Distillation

b)

Fractional Distillation

c)

Reverse Distillation

d)

Destructive Distillation

25.

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

26.
The molecular formula for Heptane is
a)
C4H10
b)
C8H18
c)
C5H12
d)
C7H16
27.
Is this hydrocarbon saturated or unsaturated? 
a)
saturated
b)
unsaturated
28.

Which homolgous series contains only C-C single bonds?

a)

alkanes

b)

alkenes

c)

alcohols

d)

carboxylic acids

29.

Which type of polymerisation uses only one monomer?

a)

addition polymerisation

b)

condensation polymerisation

30.

Classify the compound based on the functional group present.

a)

alkane

b)

alkene

c)

alkyne

d)

aromatic

31.
Classify the compound based on the functional group present.
a)
alkane
b)
alkene
c)
alkyne
d)
aromatic
32.

What is the name of this compound

a)

Pentane

b)

dibromopropane

c)

2,2-dimethylpropane

d)

1,2-dimethylpropane

33.

A hydrocarbon is:

a)

A compound made up of oxygen and hydrogen only.

b)

A compound made up of carbon and hydrogen only

c)

A compound made up of hydrogen and nitrogen only.

d)

A compound made up of carbon and oxygen only.

34.

Saturated hydrocarbons have all ...

a)

Single bonds.

b)

Double bonds.

c)

Triple bonds.

d)

Quadruple bonds.

35.

A chain of repeating units (called monomers)

a)

monomer

b)

dimer

c)

replicate

d)

polymer

36.

What happens in an Addition Polymerisation

a)

Two different functional groups bond together and expel a small molecule (often water)

b)

A small molecule is added

c)

All atoms used up when monomers join together

37.
The process of separating the different length hydrocarbons from crude oil is known as...
a)
Distillation
b)
Cracking
c)
Fractional Distillation
d)
Filtering
38.
What happens when crude oil is fractional distilled?
a)
Different fractions are mixed together to form oil.
b)
Sulfur is removed from the crude oil.
c)
The oil is separated into fractions of different boiling ranges by heating.
d)
Longer chain fractions are broken down into shorter chain fractions.
39.
Which of the following is not a use of the products from the fractional distillation of crude oil?
a)
a) Iron ore
b)
b) Petrol
c)
c) Asphalt
d)
d) Motor fuel
40.
What are fossil fuels?
a)
Dinosaur bones
b)
Resources made from once living organisms 
c)
Combination of different rocks
d)
Gas Stations
41.
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
42.
The job of an oil refinery is to
a)
transport the crude from the drill site
b)
separate crude into various types of fuel
c)
pump crude oil up to the surface
d)
mix separate types of fuel into crude
43.
Which key term is described as the attractive force BETWEEN molecules?
a)
a) Inner molecular forces
b)
b) Outer molecular forces
c)
c) Intermolecular forces
d)
d) Intramolecular forces
44.

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

a)

saturated

b)

unsaturated

45.

Where in the fractionating column are shorter chain hydrocarbon molecules obtained?

a)

At the top

b)

At the bottom

46.

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

47.

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

48.

What are the 2 products of complete combustion?

a)

carbon dioxide + hydrogen

b)

carbon dioxide + water

c)

carbon monoxide + water

d)

carbon monoxide + hydrogen

49.

Which are possible products of incomplete combustion?

a)

carbon monoxide

b)

water

c)

carbon

d)

hydrogen

50.

Name the following hydrocarbon

a)

butane

b)

hexane

c)

heptane

d)

hexene

51.

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

a)

orange --> blue/black

b)

colourless --> pink

c)

orange --> colourless

d)

orange --> clear

52.

Which of these isn't a fraction produce through fractional distillation?

a)

Bitumen

b)

Naptha

c)

Fuel oil

d)

Ethanol

53.

What is crude oil formed from?

a)

Remains of shale gas trapped under the sea bed

b)

Remains of gases trapped in the ozone layer

c)

Remains of plants and animals that died millions of years ago

d)

Remains of animal faeces from millions of years ago

54.

Which bond breaks during cracking?

a)

C-C bond

b)

C-C double bond

c)

C-H bond

d)

C-OH bond

55.

What is cracking?

a)

Process of breaking long chain alkenes into shorter chain alkanes, alkenes and hydrogen

b)

Process of breaking long chain alkanes into shorter chain alkanes, alkenes and hydrogen

c)

Process of separating long chain alkanes into shorter chain alkanes, alkenes and hydrogen

d)

Process of breaking long chain haloalkanes into shorter chain haloalkenes

56.

Which of these fractions are most in demand?

a)

LPG

b)

Bitumen

c)

Petrol

d)

Gas oil

57.

What process happens at each level in the fractionating column?

a)

Evaporation

b)

Condensation

c)

Combustion

58.

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

59.

Which of these substances is not a hydrocarbon?

a)

methane

b)

ethane

c)

propane

d)

butane

e)

ammonia

60.

Which is NOT a property of a long chain hydrocarbon?

a)

Viscous

b)

Flammable

c)

Not very volatile

d)

High boiling point

61.

Cracking is a process used to break up hydrocarbon chains because the products are more (a)   than the reactants.

62.

Which of these is not a condition of catalytic cracking?

a)

High temperature

600C degrees

b)

Rhodium catalyst

c)

Alumina - Silica (Zeolite) catalyst

63.

What is the name given to the small molecules that join together to make a polymer

(a)  

64.

What would the polymer formed from ethene monomers be called?

a)

polyethene

b)

poly(ethene)

c)

poly(propene)

d)

polyene

65.

Which one of these could polymerise to make poly(propene)

a)
b)
c)
d)
66.

What are the key points to remember when writing an equation for polymerisation?

a)

Monomer has a C=C

b)

Repeat Unit has C-C

c)

Brackets (with stalks)

d)

n before monomer and after bracket of repeat unit

67.

What monomer forms this polymer chain?

a)
b)
c)
d)
68.

What monomer forms this polymer chain?

a)
b)
c)
d)
69.

Which one of these monomers would form poly(1,2-difluoroethene)?

a)
b)
70.

Which repeat unit would be formed by the polymerisation of propene?

a)
b)
71.

Polymerisation in which double bonds in monomers break and a polymer with single bonds only is called...

(a)  

72.

True of false - this is the repeat unit for poly(propene)?

a)

True

b)

False

73.

What is cracking?

a)

A process that turns long chain hydrocarbons into short chain hydrocarbons

b)

A process that turns short chain hydrocarbons into long chain hydrocarbons

74.

Why do we use cracking to get petrol?

a)

The supply of petrol from cracking is larger than the demand

b)

The supply of petrol from fractional distillation is larger than the demand

c)

The supply of petrol from fractional distillation is smaller than the demand

d)

The supply of petrol from cracking is smaller than the demand

75.

What is always produce during cracking?

a)

Alkane + alkane

b)

Alkane + alkene

c)

Alkene + alkene

76.

Octane (8 carbons) is cracked into hexane (6 carbons) and an alkene. What is the name of this alkene?

a)

Ethene

b)

Propene

c)

Butene

d)

Pentene

77.

Decane (10 carbons) is cracked into hexane (6 carbons) and an alkene. What is the name of this alkene?

a)

Ethene

b)

Propene

c)

Butene

d)

Pentene

78.

What type of reaction is cracking?

a)

Addition

b)

Displacement

c)

Thermal decomposition

d)

Neutralisation

79.

In the following fractions, which contains the longest hydrocarbons?

a)

Refinery Gases

b)

Gasoline

c)

Kerosene

d)

Fuel oil

80.

Octane (8 carbons) is cracked into pentane (5 carbons) and an alkene. What is the name of this alkene?

a)

Ethene

b)

Propene

c)

Butene

d)

Pentene

81.

What is the test for alkenes?

a)

Adding Br2(aq), if alkene is present it will turn orange

b)

Adding Br2(aq), if alkene is present it will turn colourless

c)

Adding Br2(aq), if alkane is present it will turn orange

d)

Adding Br2(aq), if alkane is present it will turn colourless

82.

What is the temperature and catalyst for cracking?

a)

60oC and Silica or Alumina catalyst

b)

600-700oC and Bromine Water catalyst

c)

900oC and Phosphoric Acid catalyst

d)

600-700oC and Silica or Alumina catalyst

83.

What type of chemical reaction is this:

C3H8 + 5O2 --> 3CO2 + 4H2O

a)

Incomplete combustion

b)

Substitution with oxygen

c)

Complete combustion

d)

Substitution with chlorine

84.

What type of chemical reaction is this:

C3H8 + Br2 --> C3H7CBr + HBr

[it requires UV light]

a)

Incomplete combustion

b)

Substitution with chlorine

c)

Complete combustion

d)

Substitution with bromine

85.

The following could be a product of the reaction between propane and chlorine in the presence of UV light: C3H7Cl

a)

TRUE

b)

FALSE

86.

The following is a product of the reaction between propene (C3H6) and chlorine: C3H6Cl2

a)

TRUE

b)

FALSE

87.

The following is a product of the reaction between propane and chlorine: C3H7Cl

a)

TRUE

b)

FALSE

88.

The following is a product of the reaction between propane and chlorine: HCl

a)

TRUE

b)

FALSE

89.

What is the condition needed for substitution reaction with chlorine?

a)

presence of sunlight

b)

presence of red light

c)

presence of UV light

d)

all of the above

90.

Which of the following is a product formed when methane reacts under the needed conditions with chlorine?

a)

CH3Cl

b)

CH2Br2

c)

CHCl4

d)

CCl5

91.

Which of the following is true about incomplete combustion?

a)

It takes place because there is too much oxygen

b)

It takes place because there is insufficient oxygen

c)

The products are soot and propane

d)

The products are hydrogen and water

92.

What happens if an alkane reacts with limited oxygen?

a)

Produces carbon dioxide and water

b)

Produces carbon monoxide and water

c)

Produces oxygen and water

d)

Produces water only

93.

The name of the 4th member of the alkane family is (a)  

94.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
95.
How many carbon atoms are in propane
a)
1
b)
2
c)
3
d)
4
96.
Classify the compound based on the functional group present.
a)
alkane
b)
alkene
c)
alkyne
d)
aromatic
97.
The "ane" ending in "alkane" tells someone that they are dealing with _________-bonded carbons.
a)
single
b)
double
c)
triple
d)
quadruple
98.
Give the name of this compound...
C3H8
a)
Propene
b)
Butane
c)
Butene
d)
Propane
99.
The molecular formula for Heptane is
a)
C4H10
b)
C8H18
c)
C5H12
d)
C7H16
100.
General formula of Alkane is 
a)
CnH2n+2
b)
CnH2n
c)
CnH2n+1OH
d)
CnH2n+1COOH
101.

Which of the following shows the structure of ethene?

a)
b)
c)
d)
102.

Name this molecule

a)

Methane

b)

Ethane

c)

Methene

d)

Ethene

103.

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

104.

Which molecule is an example of an unsaturated hydrocarbon?

a)
b)
c)
d)
105.

All of the following diagrams show C5H12, but which two show the SAME molecule rather than different isomers?

a)
b)
c)
d)
106.

This molecule is called...

a)

butene

b)

but-1-ene

c)

but-2-ene

d)

but-3-ene

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