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Chapter 2: Hydrocarbon

Total questions: 54

Worksheet time: 34mins

Name
Class
Date
1.
The molecular formula for Heptane is
a)
C4H10
b)
C8H18
c)
C5H12
d)
C7H16
2.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
3.
Name the compound.
a)
hexane
b)
2,3-dimethylbutane
c)
ethylbutane
d)
2,2-dimethylbutane
4.
Hydrocarbons are compounds that contain
a)
  Carbon and Nitrogen
b)
Carbon and Hydrogen 
c)
  Carbon, and Oxygen
d)
Carbon, Oxygen, and  Hydrogen 
5.
How many carbons are in the backbone (longest chain) of this organic compound: 2,2-dimethylhexane
a)
1
b)
2
c)
6
d)
7
6.

Which of the following has the lowest boiling point?

a)

A. C5H12

b)

B. (CH3)2CHC2H5

c)

C. (CH3)4C

d)

D. cyclopentane

7.

Which of the following is a saturated hydrocarbon?

a)

A. C2H4

b)

B. C5H8

c)

C. C4H10

d)

D. C6H12

8.

When ethene gas was passed through a hot potassium manganate (VII) solution, the product formed was

a)

A. HCOCH3

b)

B. CH3CH2OH

c)

C. C2H4(OH)2

d)

D. CO2 and H2O

9.

Organic compound in the same homologous series have the following characteristic, except ....

a)

Same general formula

b)

Same functional group

c)

Similar chemical properties

d)

Same physical properties

10.

The empirical formula of an organic compound is CH2O. The molecular formula that is suitable for that organic compound is ….

a)

C2H6O2

b)

C2H6O

c)

C4H5O2

d)

C5H10O5

11.

The name for this compound is ....

a)

2-ethylpropane

b)

1,1-dimethylpropane

c)

2-methylbutane

d)

3-methylbutane

12.

The name for the compound is ....

a)

2,3-dimethylpropane

b)

3,4-dimethylpropane

c)

2,3-dimethylpentane

d)

3,4-dimethylpentane

13.

In which of the following reactions is oxygen use up?

a)

Addition

b)

Elimination

c)

Combustion

d)

Substitution

14.

The structure of some hydrocarbon are shown above. The hydrocarbon that classified into saturated compound are ....

a)

F, G, H

b)

F, G, I

c)

G, I, K

d)

F & G

15.

The compound which are the members of homologous series are ….

a)

F & G

b)

G & I

c)

I & J

d)

H & K

16.

The product resulted if methane substituted by Cl2 is ….

a)

CH3Cl & HCl

b)

CH2Cl & HCl

c)

C2H5Cl & HCl

d)

C2H4Cl2 & HCl

17.

The alkanes below which form as gas in room temperature is ….

a)

C4H10

b)

C5H12

c)

C10H22

d)

C20H42

18.

The alkanes which will have the highest boiling point is ….

a)

pentane

b)

2-methylbutane

c)

2,3-dimethylpropane

d)

hexane

19.
Explain, in terms of carbon-carbon bonds, why this hydrocarbon is saturated.
a)
The molecule has the maximum amount of hydrogen it can have.
b)
It is an alkane so it is saturated.
c)
There are only single bonds between the hydrogen and carbon.
d)
There are only single bonds between the carbon.
20.

How many chemical bonds can each carbon atom form?

a)

1

b)

2

c)

3

d)

4

21.

What can you tell about methane (CH4) from its molecular formula?

a)

It contains four carbon atoms.

b)

It contains one hydrogen atom.

c)

It contains four hydrogen atoms.

d)

It forms groups of four molecules.

22.
What is the general formula for saturated hydrocarbons?
a)
CnH2n
b)
CnHn+1
c)
CnH2n+1
d)
CnH2n+2
23.
Which of the following elements must be present in any organic compound?
a)
Carbon
b)
Oxygen
c)
Potassium
d)
Hydrogen
24.
At which pipe: M or N are hydrocarbons with lower boiling points collected?
a)
M
b)
N
25.

What is the name of the ester molecule?

a)

methyl propanoate

b)

propyl methanoate

c)

ethyl ethanoate

d)

methyl butacoate

26.

Which of the following statements is NOT correct about the preparation of ethanoic acid?

a)

Ethanoic acid is prepared in the laboratory by the oxidation of ethanol

b)

Acidified potassium dichromate(VI) will change from orange to green

c)

Ethanoic acid produces vinegar smell

d)

Acidified potassium dichromate(VI) acts as the reducing agent

27.

Which of the following is NOT the properties of alcohols?

a)

volatile

b)

flammable

c)

neutral in pH

d)

undergo hydration process

28.

What are the changes of colour of acidified potassium manganate(VII) in the oxidation reaction with alcohols?

a)

from orange to green

b)

from green to orange

c)

from colourless to orange

d)

from purple to colourless

29.

Which of the following is NOT an example of an addition reaction for alkenes?

a)

hydration

b)

halogenation

c)

dehydration

d)

hydrogenation

30.
As the number of carbons increases in an homologous series the melting point generally...
a)
increase
b)
decrease
c)
stay the same
d)
varies
31.
Which of the following has the highest viscosity
a)
petrol 
b)
diesel
c)
biodiesel
d)
LPG
32.
Which of the following could contain a triple bond?
a)
C4H10
b)
C4H8
c)
C4H6
d)
C4H12
33.
Which of the following is more volatile?
a)
petrol
b)
diesel
c)
oil
d)
my temper
34.

Which of the following will react with Br2(l)

a)

hexene

b)

cyclohexane

c)

hexane

d)

hexanol

35.

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

a)

distillation

b)

fractional distillation

c)

cracking

d)

polymerisation

36.

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

a)

At the top

b)

At the bottom

37.

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

38.

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

39.

What are the 2 products of complete combustion?

a)

carbon dioxide + hydrogen

b)

carbon dioxide + water

c)

carbon monoxide + water

d)

carbon monoxide + hydrogen

40.

What are the products of incomplete combustion?

a)

carbon monoxide

b)

water

c)

carbon

d)

hydrogen

41.

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

a)

fractional distillation

b)

evaporation

c)

cracking

d)

polymerisation

42.

What conditions are needed for cracking?

a)

high temperature

b)

high pressure

c)

catalyst

d)

low temperature

43.

C10H22 --> C5H12 + C3H6 + ?

a)

C2H4

b)

C3H4

c)

CO2

d)

CH4

44.

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

a)

orange --> blue/black

b)

colourless --> pink

c)

brown --> colourless

d)

brown --> clear

45.

Limewater turning cloudy is the test for...

a)

carbon dioxide

b)

water

c)

hydrogen

d)

oxygen

46.

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

47.
Fossil Fuels formed over long periods of time after particles in water settled to the sea floor and formed marine mud.  What kinds of particles needed to be present in the marine mud in order for fossil fuels to form.
a)
Mostly sand and a few small bits of wood
b)
Mostly decaying organisms
c)
Mostly lava and a few sedimentary rocks
d)
Mostly metal minerals
48.
Which of these is not a fossil fuel?
a)
Coal
b)
Oil
c)
Olive Oil
d)
Natural Gas
49.

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

a)

–CH2 group

b)

–CH group

c)

–CO2 group

d)

–CH4 group

50.

Which of the following can be used to distinguish between alkanes and alkenes?

a)

add a few drops of aqueous bromine

b)

add a few drops of Universal indicator

c)

add a piece of blue litmus paper

d)

add a piece of red litmus paper

51.

Which of the following statement is correct?

a)

Alkenes can turn aqueous bromine from reddish-brown to colourless.

b)

Alkenes can turn aqueous bromine from colourless to reddish-brown.

c)

Alkanes can turn aqueous bromine from reddish-brown to colourless.

d)

Alkanes can turn aqueous bromine from colourless to reddish-brown.

52.

Alkanes undergo substitution by chlorine only in the presence of

a)

UV light

b)

oxygen

c)

water

d)

aqueous bromine

53.

What is the product formed from the fermentation of rice with the presence of yeast?

a)

ethanoic acid

b)

ethane

c)

ethene

d)

ethanol

54.

Which of the following process used to produce margarine in industry?

a)

halogenation of alkene

b)

hydrogenation of alkene

c)

esterification reaction

d)

saponification

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