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Alkanes and Alkenes

Total questions: 45

Worksheet time: 25mins

Name
Class
Date
1.

Hydrocarbons are compounds that contain........ and .........

(a)  

2.

Molecules that contain only single covalent bonds between carbon atoms are

a)

saturated hydrocarbons

b)

unsaturated hydrocarbons

3.

Unsaturated hydrocarbon is.....

a)

Alkenes

b)

Alkanes

4.

CnH2n is molecular formula of....

a)

Alkenes

b)

Alkanes

5.

Alkanes that have 2 number of carbon atoms are....

a)

Methane

b)

Prophane

c)

Buthane

d)

Ethane

6.

If alkanes have 3 number of carbon atoms so they have atom hydrogen ......

a)

4

b)

6

c)

8

d)

10

7.

Which of the following shows the structure of ethene?

a)
b)
c)
d)
8.
The first member of the alkene series is methene.
a)
True
b)
False
9.
General formula of Alkene is 
a)
CnH2n+2
b)
CnH2n
c)
CnH2n+1OH
d)
CnH2n+1COOH
10.

Methane reacts with chlorine in substitution reaction. Which of these is an essential condition?

a)

An acid catalyst

b)

A low temperature

c)

UV light

d)

A low pressure

11.
Which of the following would have the highest melting point?
a)
C3H8
b)
C4H8
c)
C5H12
d)
C22H44
12.
How many carbon atoms are in propane
a)
1
b)
2
c)
3
d)
4
13.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
14.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
15.
The "ane" ending in "alkane" tells someone that they are dealing with _________-bonded carbons.
a)
single
b)
double
c)
triple
d)
quadruple
16.
Give the name of this compound...
C3H8
a)
Propene
b)
Butane
c)
Butene
d)
Propane
17.
General formula of Alkane is 
a)
CnH2n+2
b)
CnH2n
c)
CnH2n+1OH
d)
CnH2n+1COOH
18.
Classify the compound based on the functional group present.
a)
alkane
b)
alkene
c)
alkyne
d)
aromatic
19.

Which of the following shows the structure of propene?

a)
b)
c)
d)
20.
Both alkanes and alkenes react rapidly with aqueous bromine at room temperature.
a)
True
b)
False
21.
Which formula represents a saturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
22.
What liquid detects the presence of an alkene?
a)
Alkene water
b)
Bromine water
c)
Water
d)
Limewater
23.

Which of the following is a saturated hydrocarbon?

a)

ethene

b)

heptane

c)

propyne

d)

methanol

24.

What colour does bromine water turn in the presence of an alkene

a)

orange

b)

blue

c)

green

d)

colorless

25.

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

26.

Name the following hydrocarbon

a)

butane

b)

hexane

c)

heptane

d)

hexene

27.
Reaction mechanism shown below is
a)
Substitution reaction
b)
Nucleophilic substitution
c)
Addition reaction
d)
Bromination reaction
28.

The general formula of alkenes is CnH2nC_nH_{2n}  .

Which molecular formula represents propene?

a)

C3H6C_3H_6  

b)

C2H6C_2H_6  

c)

C3H8C_3H_8  

d)

C4H8C_4H_8  

29.

Methane reacts with chlorine in substitution reaction. Which of these is an essential condition?

a)

An acid catalyst

b)

A low temperature

c)

UV light

d)

A low pressure

30.

Alkanes react with excess oxygen to form

a)

carbon dioxide and water

b)

salt and water

c)

carbon monoxide and soot

d)

metal hydroxide and hydrogen

31.

Possible products of INCOMPLETE combustion

a)

Carbon (C)

b)

Carbon Monoxide (CO)

c)

Carbon Dioxide (CO2)

d)

Water (H2O)

32.

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

33.

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

a)

–CH2 group

b)

–CH group

c)

–CO2 group

d)

–CH4 group

34.

An unsaturated hydrocarbon is a compound that has ...

a)

C=C bonds

b)

C-C bonds

c)

C=O bonds

d)

C-O bonds

35.

Which are the following are all alkenes?

a)

methane, ethane, propane

b)

methane, ethene, propene

c)

methene, ethene, propene

d)

ethene, propene, butene

36.

Which of the following statement is correct?

a)

Alkenes can turn bromine water from yellow-brown to colourless.

b)

Alkenes can turn bromine water from colourless to yellow-brown.

c)

Alkanes can turn bromine water from yellow-brown to colourless.

d)

Alkanes can turn bromine water from colourless to yellow-brown.

37.
Cracking.....
a)
Breaks larger hydrocarbons into smaller hydrocarbons
b)
Separates hydrocarbons based on their length
c)
Detects alkenes
38.

Complete the equation C16H34 ---> __________ + C2H4

a)

C16H34

b)

C2H30

c)

C10H20

d)

C14H30

39.

What is fractional distillation?

a)

a process used to separate crude oil

b)

a process used to burn up fuels

c)

a way to make different products

d)

how oil is extracted from the ground

40.

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

41.

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

42.

Where do short chain hydrocarbons collect?

a)

At the top

b)

In the middle

c)

At the bottom

43.

Where do long chain hydrocarbons collect?

a)

At the top

b)

In the middle

c)

At the bottom

44.

A chain of repeating units (called monomers)

a)

monomer

b)

dimer

c)

replicate

d)

polymer

45.

Polyunsaturated means having many

a)

C=C bonds

b)

C-C bonds

c)

C=O bonds

d)

C-O bonds

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