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WorksheetsOrganic Chemistry IGCSE
Total questions: 30
Worksheet time: 15mins
Which structure represents a compound which has pH less than 7?
Which equation represents the incomplete combustion of pentane, C5H12 ?
2C5H12 + 11O2 → 10CO + 12H2O
C5H12 + 8O2 → 5CO2 + 6H2O
2C5H12 + 17O2 → 10CO + 24H2O
C5H12 + 10O2 → 5CO2 + 12H2
There are two processes to manufacture ethanol. Which of these processes uses a catalyst?
A
B
C
D
Which equation represents the complete combustion of ethane, C2H6?
2C2H6 + 3O2 → 4C + 6H2O
2C2H6 + 5O2 → 4CO + 6H2O
2C2H6 + 7O2 → 4CO2 + 6H2O
C2H6 + 2O2 → 2CO2 + 3H2
Which statement about homologous series is not correct?
All homologous series are hydrocarbons.
Members of a homologous series have the same functional group.
Members of a homologous series have similar chemical properties.
The alkanes are an example of a homologous series.
Name the product of these reactions.
ethene + bromine → ___
ethene + steam → ___
ethane, ethanol
dibromoethane, ethanol
ethanol, ethane
ethanol, dibromoethane
Which compounds have the same functional group?
propanol and propanoic acid
butane and butene
ethane and propane
butene and butanol
Name X and Y.
X + yeast → ethanol
etanol + oxygen → carbon dioxide + Y
ethane, yeast
glucose, steam
water, steam
yeast, glucose
The table shows bonds that are present and bonds that are not present in compound P. What type of compound is P?
a carboxylic acid
an alcohol
an alkane
an alkene
Which compound below is unsaturated?
Which molecular formula below represents an alkene?
C2H6
C2H4
C3H8
C4H10
What is the name of this structure?
ethane
ethanoic acid
ethanol
ethene
Which structure below is not belong to the same homologous series?
Which structure is correctly named?
When the alcohol ethanol reacts with the carboxylic acid propanol, an ester is formed. What is the name of this ester?
ethyl propanoate
propyl ethanoate
ethyl ethanoate
propyl propanoate
The table shows the smell of esters. Which statement give the correct smell of ester?
1, 2 and 3
1 and 2
2 and 3
1 only
Which statement about a molecule of ethene is correct?
An ethene molecule has at least one double bond.
It has C-H and C=O bonds.
An ethene molecule has seven covalent bonds.
Its bonds are formed by the transfer of electrons.
Which compound decolourises bromine water?
2-methyl butane
propane
cyclohexane
hexene
Why is ethanol a member of the homologous series of alcohols but propane is not?
Ethanol has two carbon atoms per molecule but propane has three.
Ethanol can be made from ethene but propane is obtained from petroleum.
Ethanol is a liquid but propane is a gas.
Ethanol contains the same functional group as other alcohols but propane does not.
How many different types of bonds are present in ethane, C2H6?
A
B
C
D
What is the gas produced by incomplete combustion?
carbon monoxide
hydrogen
carbon dioxide
sulfur dioxide
Which two compounds are molecules which both contain double bond?
ethane and ethanoic acid
ethane and ethanol
ethene and ethanoic acid
ethene and ethanol
What is the general formula of alcohol?
CnH2nO
CnH2n+2
CnH2n
CnH2n+1OH
Which statements about aqueous ethanoic acid are correct?
Ethanoic acid contains the functional group -COOH.
Ethanoic acid reacts with carbonates to produce hydrogen.
Ethanoic acid turns Universal Indicator paper blue.
Ethanoic acid has a pH higher than pH 7.
What are the properties of ethanol?
A
B
C
D
Which compound below is the isomer of ethyl methanoate?
methyl methanoate
methyl ethanoate
ethyl ethanoate
ethanoic acid
Which homologous series does belong to this compound?
alcohols
alkanes
alkenes
carboxylic acids
What method of making ethanol by using this diagram?
fermentation
hydration
substitution
distillation
X, Y and Z are three hydrocarbons.
X : CH2=CH2
Y : CH3-CH=CH2
Z : CH3-CH2-CH=CH2
What do componds X, Y and Z have in common?
They are all alkanes.
They are all part of different homologous series.
They have the same functional group.
They all have the same boiling point.
Which bond do methanol and methanoic acid have in common?
C-C
C=C
C-O
C=O
