Organic Chemistry

Nomenclature and homologous series

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Nomenclature and homologous series under Organic Chemistry for Grade 12 IGCSE.

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1.
$CH_{3}CH_{2}CH_{2}COOH$
A. $Propanoic acid$
B. $Butanoic acid$
C. $Pentanoic acid$
D. $Butanal$
2.
$By what group of atoms does each member of a homologous series differ from the next member?$
A. $CH_{3}$
B. $CH_{4}$
C. $CH_{2}$
D. $C_{2}H_{4}$
3.
$What is the general formula for the homologous series of alkanes?$
A. $C_{n}H_{2n}$
B. $C_{n}H_{2n+2}$
C. $C_{n}H_{2n-2}$
D. $C_{n}H_{2n+1}OH$

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Alkanes

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Alkanes under Organic Chemistry for Grade 12 IGCSE.

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1.
$C_3H_8$
A. $C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O$
B. $C_3H_8 + 3O_2 \rightarrow 3CO + 4H_2O$
C. $2C_3H_8 + 7O_2 \rightarrow 6CO + 8H_2O$
D. $C_3H_8 + 4O_2 \rightarrow 3CO_2 + 2H_2O$
2.
$As the number of carbon atoms in the alkane chain increases, which of the following physical properties also increases?$
A. $Volatility$
B. $Flammability$
C. $Boiling point$
D. $Rate of evaporation$
3.
$Alkanes are described as 'saturated' hydrocarbons. What does the term 'saturated' mean in this context?$
A. $They contain only single carbon-carbon bonds.$
B. $They are highly reactive towards most chemicals.$
C. $They contain the maximum possible number of carbon atoms.$
D. $They are dissolved in a solvent until no more can be added.$

Download the worksheet for Organic Chemistry - Alkanes to practice offline. It includes additional chapter-level practice questions.

Alkenes

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Alkenes under Organic Chemistry for Grade 12 IGCSE.

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1.
$When ethene reacts with steam in the presence of a phosphoric(V) acid catalyst, what is the primary product formed?$
A. $Ethane$
B. $Ethanoic acid$
C. $Ethanol$
D. $Ethyl ethanoate$
2.
$Which term best describes why alkenes are called 'unsaturated' hydrocarbons?$
A. $They contain only single carbon-carbon bonds.$
B. $They react readily with oxygen to form carbon dioxide and water.$
C. $They contain at least one carbon-carbon double bond.$
D. $They cannot dissolve any more solutes at room temperature.$
3.
$What is the characteristic color change observed when bromine water is added to an alkene?$
A. $From colorless to orange$
B. $From blue to red$
C. $From orange to colorless$
D. $From purple to colorless$

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Alcohols

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Alcohols under Organic Chemistry for Grade 12 IGCSE.

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1.
$What are the products of the complete combustion of ethanol in excess oxygen?$
A. $Carbon monoxide and water$
B. $Carbon and water$
C. $Ethanoic acid and hydrogen$
D. $Carbon dioxide and water$
2.
$CH_3CH(OH)CH_3$
A. $Propan-1-ol$
B. $Propan-2-ol$
C. $Ethanol$
D. $Isopropanol$
3.
$Which reagent and conditions are typically used to oxidize ethanol to ethanoic acid in a school laboratory?$
A. $Acidified potassium manganate(VII) and heat under reflux$
B. $Aqueous sodium hydroxide and room temperature$
C. $170^{\circ}C$
D. $150^{\circ}C$

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Carboxylic acids

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Carboxylic acids under Organic Chemistry for Grade 12 IGCSE.

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1.
$What is the general formula for the homologous series of carboxylic acids?$
A. $C_{n}H_{2n}O$
B. $C_{n}H_{2n+1}COOH$
C. $C_{n}H_{2n}COOH$
D. $C_{n}H_{2n+1}OH$
2.
$Which gas is evolved when ethanoic acid reacts with sodium hydrogen carbonate?$
A. $Carbon dioxide$
B. $Hydrogen$
C. $Oxygen$
D. $Carbon monoxide$
3.
$What is the IUPAC name of the third member of the carboxylic acid homologous series?$
A. $Methanoic acid$
B. $Ethanoic acid$
C. $Propanoic acid$
D. $Butanoic acid$

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Polymers (Addition and Condensation)

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Polymers (Addition and Condensation) under Organic Chemistry for Grade 12 IGCSE.

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1.
$Which of these substances is a naturally occurring polymer?$
A. $Nylon$
B. $Terylene$
C. $Protein$
D. $Poly(ethene)$
2.
$What is the small molecule typically released during the formation of a polyester from a dicarboxylic acid and a diol?$
A. $H_{2}$
B. $CO_{2}$
C. $HCl$
D. $H_{2}O$
3.
$Identify the monomer used to produce the polymer shown in the diagram below.$
A. $Ethene$
B. $Propene$
C. $But-1-ene$
D. $But-2-ene$

Download the worksheet for Organic Chemistry - Polymers (Addition and Condensation) to practice offline. It includes additional chapter-level practice questions.

Nomenclature and homologous series

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Alkanes

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Alkenes

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Alcohols

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Carboxylic acids

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Polymers (Addition and Condensation)

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