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Alkenes

Total questions: 23

Worksheet time: 16mins

Name
Class
Date
1.
General formula of Alkene is 
a)
CnH2n+2
b)
CnH2n
c)
CnH2n+1OH
d)
CnH2n+1COOH
2.

Which of the following is a saturated hydrocarbon?

a)

ethene

b)

heptane

c)

propyne

d)

methanol

3.

Which of the following is unsaturated hydrocarbon ?

a)

propane

b)

propene

c)

propanol

d)

propanoic acid

4.

A compound consists of carbon and hydrogen elements only. It also contains a carbon-carbon double bond. This compound is known as

a)

saturated organic compound

b)

unsaturated organic compound

c)

saturated hydrocarbon

d)

unsaturated hydrocarbon

5.

What are the products formed when organic compounds burn completely ?

a)

carbon and oxygen

b)

carbon dioxide and water

c)

carbon, carbon monoxide and water

d)

carbon, carbon dioxide and water

6.

What chemical is this? (C5H10)

a)

Pentene

b)

Pentane

c)

Hexane

d)

Heptene

7.
Classify the compound based on the functional group present.
a)
alkane
b)
alkene
c)
alkyne
d)
aromatic
8.

Which of the following shows the structure of ethene?

a)
b)
c)
d)
9.

Which of the following shows the structure of propene?

a)
b)
c)
d)
10.
Alkanes are known as saturated hydrocarbons because they contain only carbon-hydrogen single bonds.
a)
True
b)
False
11.
The boiling points and viscosity of alkane molecules increase as their molecular sizes increase.
a)
True
b)
False
12.
Both alkanes and alkenes react rapidly with aqueous bromine at room temperature.
a)
True
b)
False
13.
Which formula represents a saturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
14.
Which formula represents an unsaturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
15.
Cracking.....
a)
Breaks larger hydrocarbons into smaller hydrocarbons
b)
Separates hydrocarbons based on their length
c)
Detects alkenes
16.
What liquid detects the presence of an alkene?
a)
Alkene water
b)
Bromine water
c)
Water
d)
Limewater
17.

Complete the equation C16H34 ---> __________ + C2H4

a)

C16H34

b)

C2H30

c)

C10H20

d)

C14H30

18.

C10H22 --> C5H12 + C3H6 + ?

a)

C2H4

b)

C3H4

c)

CO2

d)

CH4

19.

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

a)

orange --> blue/black

b)

colourless --> pink

c)

orange --> colourless

d)

orange --> clear

20.

Cracking large hydrocarbons releases...

a)

alkanes and alkenes

b)

alkanes only

c)

alkenes only

d)

polymers only

21.
The first member of the alkene series is methene.
a)
True
b)
False
22.

If an alkene has 20 carbon atoms, how many hydrogen atoms will it have?

a)

20

b)

22

c)

40

d)

42

23.
The "ane" ending in "alkane" tells someone that they are dealing with _________-bonded carbons.
a)
single
b)
double
c)
triple
d)
quadruple

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