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Hydrocarbons

Total questions: 51

Worksheet time: 51mins

Name
Class
Date
1.
Which of the following could contain a triple bond?
a)
C4H10
b)
C4H8
c)
C4H6
d)
C4H12
2.
Which one of the following is saturated?
a)
water
b)
C4H8
c)
C4H10
d)
C5H8
3.
Which of the following does not contain only carbon and hydrogen
a)
alkanes 
b)
alkenes
c)
alkynes
d)
alkanols
4.

Hydrocarbons are compounds that contain

a)

only carbon

b)

only carbon and hydrogen

c)

only carbon, oxygen, and hydrogen,

d)

only carbon, oxygen, hydrogen, and nitrogen

5.

What is the general formula of the alkenes?

a)

CnH2n+1

b)

CnH2n+2

c)

CnH2n

d)

CnH2n-2

6.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
7.
Which formula represents an unsaturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
8.

What is the suffix for a hydrocarbon that contains a double bond ?

a)

-ol

b)

-ene

c)

-ane

d)

-one

9.
The molecular formula for Heptane is
a)
C4H10
b)
C7H18
c)
C5H12
d)
C7H16
10.
How many carbon atoms are in ethane?
a)
1
b)
2
c)
3
d)
4
11.

What is the correct name for the alkyne shown?

a)

butyne

b)

but-1-yne

c)

but-2-yne

d)

1-methyl-1-propyne

12.

The general formulas for alkanes, alkenes and alkynes are:

a)

alkane: CnH2n+2

alkene: CnH2n

alkyne: CnH2n-2

b)

alkane: CnH2n

alkene: CnH2n+2

alkyne: CnHn+4

c)

alkane: CnH2n-2

alkene: CnH2n

alkyne: CnH2n+2

d)

alkane: CnH2n+2

alkene: CnH2n

alkyne: CnHn-4

13.

What is the correct structure for but-2-ene?

a)
b)
c)
d)
14.
Classify the compound based on the functional group present.
a)
alkane
b)
alkene
c)
alkyne
d)
aromatic
15.

What chemical is this? (C5H10)

a)

Pent-1-ene

b)

Pent-5-ene

c)

Pent-2-ene

d)

pent-4-ene

16.

This prefix means 7

a)

but

b)

hept

c)

hex

d)

non

17.

is the alkene with 3 carbons in its chain.

a)

Ethene

b)

Propene

c)

Methene

d)

Decene

18.

Match the following

a)

alkane

1.

CnH2n+2

b)

alkene

2.

CnH2n

c)

Ethene

3.

C2H4

d)

alkyne

4.

CnH2n-2

19.
Which of the following elements must be present in any organic compound?
a)
Carbon
b)
Oxygen
c)
Potassium
d)
Hydrogen
20.
Which is an organic compound?
a)
Carbon Dioxide
b)
Carbon Monoxide
c)
Carbonates
d)
Ethane
21.
Which of the following compounds is an example of hydrocarbon?
a)
CO2
b)
C2H6
c)
C2H5OH
d)
CH3COOH
22.
At which pipe: M or N are hydrocarbons with lower boiling points collected?
a)
M
b)
N
23.
The following compounds have a molecular formula of
a)
CnH2n+2
b)
CH4
c)
C6H14
d)
CH3CH2CH2CH2CH2CH3
24.
Which compound is inorganic?
a)
Glucose (C₆H₁₂O₆)
b)
Ethane (C₂H₆)
c)
Carbon Dioxide (CO₂)
d)
Stearic Acid (C₁₈H₃₆O₂)
25.

propyl is a....

a)

three carbon chain

b)

three carbon side chain

c)

triple bond

26.

How many methyl groups are on the following molecule?

a)

1

b)

2

c)

3

d)

4

27.

How many carbons are in the longest chain?

a)

7

b)

8

c)

9

d)

10

28.

What group(s) is/are found on the following molecule?

a)

methyl

b)

ethyl

c)

butyl

d)

methyl and butyl

e)

all of the above

29.

What is wrong with the name 2,4-methylhexane

a)

inappropriate use of commas

b)

inappropriate use of dashes

c)

a prefix is missing

d)

a space is missing

30.
a)
2,3-dimethyl-4,4-diethyl heptane
b)
2,3-methyl-4,4-ethyl heptane
c)
4,4-ethyl-2,3-methyl heptane
d)
4,4-diethyl-2,3-dimethyl heptane
31.
a)

4-ethyl-6-methylnonane

b)

3-propyl-5-methyloctane

c)

2,4-dipropylhexane

d)

4-ethyl-2-propylheptane

32.

What is the correct name for the following compound?

a)

3,4-dimethylheptane

b)

4-methyl-5-ethylhexane

c)

3-methyl-4-propylpentane

d)

4,5-dimethylheptane

33.

What is the correct name for the alkyne shown?

a)

butyne

b)

1-butyne

c)

2-butyne

d)

1-methyl-1-propyne

34.

A substance with a high boiling point . . .

a)

changes rapidly from a liquid to a gas at a low temperature.

b)

changes rapidly from a liquid to a gas at a high temperature.

c)

flows easily.

d)

doesn't flow easily.

e)

is easy to ignite and burn.

35.

The boiling point of hydrocarbons . . .

a)

increases with increasing molecular size.

b)

decreases with increasing molecular size.

c)

is not affected by molecular size.

36.

The viscosity of hydrocarbons depends on the size of their molecules. What is viscosity?

a)

a measure of how difficult it is for a substance to flow

b)

a measure of how easy it is to ignite and burn

c)

a substance the temperature at which a substance rapidly changes state from a liquid to a gas

37.

A substance with a low viscosity . . .

a)

evaporates at a low temperature.

b)

evaporates at a high temperature.

c)

flows easily.

d)

doesn't flow easily.

e)

is easy to ignite and burn.

38.

The flammability of hydrocarbons depends on the size of their molecules. What is flammability?

a)

a measure of how difficult it is for a substance to flow

b)

a measure of how easy it is to ignite and burn

c)

a substance the temperature at which a substance rapidly changes state from a liquid to a gas

39.

A highly flammable substance . . .

a)

evaporates at a high temperature.

b)

flows easily.

c)

doesn't flow easily.

d)

is easy to ignite and burn.

e)

is difficult to ignite and burn

40.

Crude oil is a mixture of a very large number of compounds. Most of the compounds in crude oil are hydrocarbons. What is a hydrocarbon?

a)

a compound that contains only hydrogen and carbon atoms

b)

a compound that contains hydrogen, carbon and other elements

c)

a compound with a carbon backbone

41.

Where is crude oil found?

a)

between layers of impermeable rock

b)

as seams of rock

c)

in the atmosphere

42.

What was crude oil formed from?

a)

plankton

b)

plants

c)

carbon dioxide

43.

Where in the fractionating column do the hydrocarbons with the highest boiling points condense?

a)

at the top of the fractionating column

b)

in the middle of the fractionating column

c)

at the bottom of the fractionating column

44.

How does fuel oil compare to petrol?

Select two statements.

a)

Fuel oil has a higher boiling point than petrol.

b)

Fuel oil has a lower boiling point than petrol.

c)

Fuel oil contains larger hydrocarbon molecules than petrol.

d)

Fuel oil contains smaller hydrocarbon molecules than petrol.

45.

Combustion is a scientific term for ________.

a)

burning

b)

dissolving

c)

rusting

46.

Select the correct word equation for the combustion of a fuel.

A

a)

A

b)

B

c)

C

47.

Given the formula representing a compound:


Which formula represents an isomer of this compound?

a)
b)
c)
d)
48.

Which formulas represent compounds that are isomers of each other?

a)
b)
c)
d)
49.

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

50.

Which structural formula represents a molecule that is not an isomer of pentane?

a)
b)
c)
d)
51.

Which compound has an isomer?

a)
b)
c)
d)

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