WORKSHEET TOPIC: AKANE
1 Which statement about alkanes is correct?
A Ethane reacts with chlorine in an addition reaction.
B Propane has a higher boiling point than butane.
C The molecule of the alkane that contains 99 carbon atoms has 200 hydrogen atoms.
D There are three isomers with the formula C4H10.
2 Which is a correct definition of isomers?
A atoms with the same relative atomic mass and different structures
B compounds with the same molecular formula and different structures
C compounds with the same molecular mass and different structures
D elements with the same molecular mass and the same structures
3 Which statement about the properties of propane and hexane is correct?
A Propane has a higher boiling point than hexane.
B Propane has a higher relative molecular mass than hexane.
C Propane has more isomers than hexane.
D Propane is more flammable than hexane.
4 Methane is the first member of the alkane series of hydrocarbons. The second member is ethane.
Which statements about ethane are correct?
1 Ethane has the formula C2H4.
2 Ethane has a higher boiling point than that of methane.
3 Ethane has the same molecular formula as methane.
4 Ethane has chemical properties very similar to those of methane.
A 1, 2 and 3 B 1 and 4 C 2 and 4 D 3 only
5 Compounds X and Y are both alkanes. Compound X has a higher boiling point than compound
Y. What could be the formulae of compounds X and Y?
compound X compound Y
a d
A C8H16 C9H18
m m
B C8H18 C9H20
H a
C C9H18 C8H16
D C9H20 C8H18
e m
d e
N a
r .
Dr.Nadeem Haider Hammad BSS/Cantt
D
Chemistry 5070 P1 03234469901
6 Which alkane, when any one hydrogen atom is substituted by a chlorine atom, will not produce
isomers?
A B
H H H H H
H C C H H C C C H
H H H H H
C D
H H H H H H H
H C C C C H H C C C H
H H H H H H
H C H
7 The diagram shows two compounds.
H H H H H H H
H C C C C H H C C C H
H H H H H H
H C H
It can be predicted from their formulae that the compounds have the same
A boiling point. B composition by mass.
a d
C melting point. D structural formula.
m m
8 Which statement concerning isomers is true? H a
A
B
Diamond and graphite are isomers of each other.
Isomers have the general formula CnH2n+2. e m
C Isomers have the same molecular formula.
d e
D
a
Macromolecules are isomers of the small molecules from which they are made.
N
r .
Dr.Nadeem Haider Hammad BSS/Cantt
D
Chemistry 5070 P1 03234469901
9 Four hydrocarbon structures are shown.
H
H H H
H H C H
H C C C H
H C C H H H
H C H
H C H H
H
H
1 2
H H H
H H H
H C C H H C C C C H
H C C H H H H
H C H
H H
H
3 4
Which hydrocarbons are isomers of each other?
A 1, 2 and 3 B 1, 2 and 4 C 1 and 2 only D 3 and 4
10 A mixture of four gases, methane, ethane, propane and butane is cooled until the first
drop of liquid is formed. What compound is most likely to be present in this drop?
A Butane B ethane C methane D propane
11 Alkanes are a homologous series of organic compounds. Which statement about alkanes
is correct?
A Their boiling points increase as the length of the carbon chain increases.
B Their general formula is CnH2n.
C They are unsaturated hydrocarbons. a d
D They take part in addition reactions.
mm
H a
12 Which statement applies to all three of the compounds ethane, ethene and ethanol?
A One molecule of each compound contains the same number of carbon atoms.
B One mole of each compound contains the same number of hydrogen atoms. e m
C They all occur in crude oil.
d e
D They are all liquids at room temperature.
N a
r .
Dr.Nadeem Haider Hammad BSS/Cantt
D
Chemistry 5070 P1 03234469901
13 Five structures are shown.
1 2 3
H
H
H H H H
H C H H C H H
H C C C C H H
H C C C
H H H H C C C
H H H H H
4 5
H H H H H H H
H C C C
H C C C C H
H H
H C H H H
Which structures represent identical molecules?
A 1 and 3 only B 2 and 3 only C 1, 3 and 4 only D 1, 3 and 5 only
14 The displayed formulae of two compounds are shown.
H H H
O O
H
H C C H C C C
H O C H H H O H
H
What are the similarities and differences between the two compounds?
a d
mm
H a
e m
d e
N a
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Dr.Nadeem Haider Hammad BSS/Cantt
D
Chemistry 5070 P1 03234469901
15 Which structure is not an isomer of the structure shown?
CH3 CH2 CH2 CH2 CH3
A CH3 CH2 CH CH3
CH3
CH3
B CH3 C CH3
CH3
C CH3 CH2 CH2 CH2
CH3
D CH3 CH CH2 CH3
CH3
16 Which two compounds are members of the same homologous series?
1 2
H H
H C O H H C C O H
H H O
3 4
H H H H
H C C O H H C O C H
a d
H H H H
mm
A 1 and 2 B 1 and 3 C 1 and 4 D 2 and 4
H a
e m
17 Which property of the alkanes does not increase as relative molecular mass increases?
d e
A boiling point B flammability C melting point a
D viscosity
N
r .
Dr.Nadeem Haider Hammad BSS/Cantt
D
Chemistry 5070 P1 03234469901
18 In which of the following are all the compounds members of the same homologous series?
A CH4 C2H6 C3H6
B CH4 C2H6 C3H8
C C 2H 4 C3H6 C4H10
D C 3H 4 C3H6 C3H8
19 Methane, CH4, the first member of the alkane homologous series, has a boiling point of –
161 oC. Which molecular formula and boiling point could be correct for another alkane?
molecular formula boiling point / oC
A C2H4 – 88
B C2H6 – 185
C C3H6 – 69
D C3H8 – 42
20 Which polymer has the empirical formula CH?
A B C D
H H H H H H H H
C C C C C C C C
H H n H CH3 n H C2H5 n H C6H5 n
a d
m m
H a
e m
de
N a
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Dr.Nadeem Haider Hammad BSS/Cantt
D
Chemistry 5070 P1 03234469901
