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IGCSE Chemistry11.2 Naming organic compoundsQuestion Bank

Question 1

Question 1(a)

(a)

Five organic compounds have the following structures.
A
C
C
A
,

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B
B

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D

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E

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[ 1 ]

Question 1(a)(i)

(i)

Which compound is butane?

[ 1 ]

Question 1

Question 1(a)

(a)

The structures of five organic compounds, A, B, C, D and E, are shown.
Answer the questions that follow.
Each letter may be used once, more than once or not at all.
A

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B

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c

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D

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E
E

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[ 2 ]

Question 1(a)(i)

(i)

Give the letter of the compound that is propan-1-ol.

[ 1 ]

Question 1(a)(vii)

(ii)

Give the letter of one compound that is an acid.

[ 1 ]

Question 2

[Maximum number: 1]

The structures of six organic compounds are shown.
A

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B

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C

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D

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E

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F

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Question 2(a)

(a)

Give the name of F.

[ 1 ]

Question 4

[Maximum number: 1]

Gasoline is used as a fuel for cars. It is a mixture of hydrocarbons.

Question 4(d)

(a)

The formula C4H10\mathrm{C}_{4} \mathrm{H}_{10} represents two structural isomers, A and B.

A

A

B

B

[ 1 ]

Question 4(d)(i)

(i)

Name isomer A.

[ 1 ]

Question 4

[Maximum number: 3]

Ethanol is made industrially by the reaction of ethene with steam. The reaction occurs at a temperature of 300C300^{\circ} \mathrm{C} and a pressure of 60 atmospheres.

C2H4( g)+H2O( g)C2H5OH( g)\mathrm{C}_{2} \mathrm{H}_{4}(\mathrm{~g})+\mathrm{H}_{2} \mathrm{O}(\mathrm{~g}) \rightleftharpoons \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}(\mathrm{~g})

A catalyst is used in this reaction.
The forward reaction is exothermic.

Question 4(c)

(a)

Ethanol is a member of the alcohol homologous series.

Members of the same homologous series have the same general formula.

[ 2 ]

Question 4(c)(iii)

(i)

One alcohol containing three carbon atoms is propan-1-ol.

Draw the structure of one other alcohol containing three carbon atoms. Show all of the atoms and all of the bonds.

Name the alcohol you have drawn.
name

[ 2 ]

Question 4(d)

(b)

When alcohols react with carboxylic acids, esters are produced.

[ 1 ]

Question 4(d)(i)

(i)

The structure of ester X is shown.

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Name ester X.

[ 1 ]

Question 4

[Maximum number: 7]

Methanol is made industrially by reacting carbon monoxide with hydrogen. The gases react at a temperature of 250C250^{\circ} \mathrm{C} and a pressure of 75 atmospheres.

CO( g)+2H2( g)CH3OH( g)\mathrm{CO}(\mathrm{~g})+2 \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons \mathrm{CH}_{3} \mathrm{OH}(\mathrm{~g})

The forward reaction is exothermic.

Question 4(c)

(a)

Methanol is a member of the homologous series of alcohols.

[ 4 ]

Question 4(c)(ii)

(i)

Draw the structures of two different alcohols, each containing three carbon atoms. Show all of the atoms and all of the bonds.

Name these two alcohols.
name
name

[ 4 ]

Question 4(d)

(b)

Alcohols react with carboxylic acids to produce esters.

[ 3 ]

Question 4(d)(i)

(i)

The structure of ester X is shown.

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Name ester X.

[ 1 ]

Question 4(d)(iii)

(ii)

Ester Y is different from ester X but also has the formula C3H6O2\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}_{2}. Draw the structure of ester Y. Show all of the atoms and all of the bonds.

[ 2 ]

Question 4

[Maximum number: 3]

This question is about ethanoic acid, CH3COOH\mathrm{CH}_{3} \mathrm{COOH}.

Question 4(d)

(a)

Ethanoic acid reacts with methanol to form an ester.

[ 3 ]

Question 4(d)(ii)

(i)

Draw the structure of the ester formed when ethanoic acid reacts with methanol. Show all of the atoms and all of the bonds. Name the ester.
structure
name

[ 3 ]

Question 4

[Maximum number: 5]

A carboxylic acid reacts with an alcohol to produce an ester and water.
Under certain conditions, this reaction can be reversed so an ester reacts with water to produce a carboxylic acid X and an alcohol Y.

The reaction reaches an equilibrium.

CH3CH2COOCH3+H2OX+Y\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOCH}_{3}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathbf{X}+\mathbf{Y}

The forward reaction is endothermic.

Question 4(b)

(a)

Name the ester.

[ 1 ]

Question 4(c)

(b)

Name carboxylic acid X and draw its displayed formula.
name
displayed formula

[ 2 ]

Question 4(d)

(c)

Name alcohol Y and give its structural formula.
name
structural formula

[ 2 ]

Question 32

[Maximum number: 1]

What is the structure of butanoic acid?

Question 32

[Maximum number: 1]

What is the structure of propanoic acid?

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