AQA AS Chemistry

Topic Questions

3.1 Introduction to Organic Chemistry

11 mark

2,2-dimethylpropane is an isomer of pentane. 

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What type of isomerism is shown by 2,2-dimethylpropane? 

  • Stereoisomerism

  • Functional group

  • Cyclic

  • Chain

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21 mark

Which of the following molecules are hydrocarbons?

6XkBEQnz_14

 

1

2

3

4

A

B

C

D

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31 mark

What is the correct formula for 1-fluoro-3-methylbut-2-ene?

A

Structural

CH2FCH2C(CH3)CH3

B

Displayed

49PoSHH-_18

C

Empirical

C5H9F

D

Skeletal

LNQCffqj_17

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41 mark

What is the correct meaning of the term structural isomer

  • A compound that contains a different molecular formula and the atoms are arranged differently in space

  • A compound that contains the same molecular formula but the atoms are arranged differently in space

  • A compound with the same empirical formula but different structural formula

  • A compound with the same molecular formula but different structural formula

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51 mark

Which of the following is the displayed formula for ethylamine?

  • o2fVq3mh_19

  • ~NmP58cu_20

  • Nzgj0Zrn_21

  • 5AHXcvF8_22

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61 mark

Which of the hydrocarbons shown below does not belong in the same homologous series as the other compounds?

  • C9H20

  • C8H16

  • C7H16

  • C8H18

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71 mark

What is the identity of the functional group that is ringed in the molecule shown below?

M3qovCdV_23

  • Aldehyde

  • Ketone

  • Carboxylic acid 

  • Alkene

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81 mark

What is the IUPAC name of the following molecule?

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  • 2-chloro-3-methylpentane

  • 3-methyl-4-chloropentane

  • 2-ethyl-3-chlorobutane

  • 2-chloro-3-ethylbutane

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91 mark

Chlorine gas reacts explosively with hydrogen in sunlight.

Which of the following represents the initiation step of the reaction?

  • H + Cl→ HCl

  • H + Cl2 → HCl + Cl

  • Cl + H2 → HCl + H

  • Cl2 → Cl + Cl

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101 mark

What is the correct IUPAC name for the stereoisomer below?

z-1-2-dichloroethene-displayed-

  • E-1,2-dichloroethene

  • Z-1,2-chloroethene

  • E-1,2-dichloroethane

  • Z-1,2-dichloroethene

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11 mark

What is the systematic name of the compound below?

q1-hard-3-1-introduction-to-organic-chemistry

  • E-2-bromobut-2-ene

  • Z-2-bromobut-2-ene

  • E-1,2-dimethyl-1-bromoethene

  • Z-1,2-dimethyl-1-bromoethene

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21 mark

Limonene is found in the peel of citrus fruits.

q2-hard-3-1-introduction-to-organic-chemistry

What is the correct empirical and molecular formula of limonene?

 

Empirical Formula

Molecular formula

A

C9H13

C9H13

B

C5H9

C10H18

C

C10H8

C10H16

D

C5H8

C10H16

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31 mark

How many structural isomers of C6H14O are tertiary alcohols?

  • 2

  • 3

  • 4

  • 5

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41 mark

How many isomers with the formula C5H10, including structural and stereoisomers, contain π bonds (double bonds)?

  • 3

  • 4

  • 5

  • 6

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51 mark

Which compound is unsaturated, alicyclic and contains an alkyl group?

T27WrHBX_q5-hard-3-1-introduction-to-organic-chemistry

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61 mark

What is the correct structural formula for 2,2-dibromo-4-methylhexane?

  • CH3CHBrCBr(CH3)CH2CH2CH3

  • CH3CBr2CH(CH3)CH2CH2CH3

  • CH3CHBrCH(CH3)CHBrCH2CH3

  • CH3CBr2CH2CH(CH3)CH2CH3

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71 mark

Which of the following are functional group isomers of one another?

 

CH3CH2CH2COOH

CH3CH(OH)CH2CH2CH3

HCOOCH2CH2CH3

CH3CH2CH(OH)CH2CH3

A

B

C

D

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81 mark

What types of isomerism can the following molecule show?

q8-hard-3-1-introduction-to-organic-chemistry

 

Branch-chain

Positional

Functional group

A

B

C

D

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91 mark

Which of the following are functional group isomers of each other?

q9-hard-3-1-introduction-to-organic-chemistry

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101 mark

Z-Citral, shown in the diagram, is used in the synthesis of vitamin A.

Which of the double bonds, labelled A, B, C or D, is responsible for the letter Z in the name?

ma10-hard-3-1-introduction-to-organic-chemistry

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11 mark

Xylitol is an artificial sweetener used in toothpastes and chewing gum to improve their taste without impairing dental hygiene.

q1-medium-3-1-introduction-to-organic-chemistry

Which functional groups could be produced if xylitol is oxidised under suitable conditions?

 

Alkene

Aldehyde

Carboxylic acid

Ketone

A

B

C

D

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21 mark

How many structural isomers are there of tribromopropane, C3H5Br3?

  • 4

  • 5

  • 6

  • 7

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31 mark

Which features about the members of a homologous series are correct?

 

All members have the same general formula

The members have similar chemical properties

The members show a gradual change in physical properties

A

B

C

D

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41 mark

Octane is a component of petrol or gasoline. Which of the following molecules could be an isomer of octane?

  • CH3CH2CHCHCHCH2(CH3)2 

  • CH3(CH2)5CH3

  • (CH3)2CHCH(CH2)2(CH3)2

  • CH3CHCHCH(CH2)2(CH3)

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51 mark

What is the name of the following molecule?

q5-medium-3-1-introduction-to-organic-chemistry

  • 2,3,3-tetramethylpentane

  • 3,3,5-trimethylhexane

  • 2,4,4,4-trimethylethylbutane

  • 2,4,4-trimethylhexane

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61 mark

How many branched-chain isomers are there which have the molecular formula C5H12?

  • 3

  • 4

  • 5

  • 6

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71 mark

Which statements are correct for the organic molecule below?

q7-medium-3-1-introduction-to-organic-chemistry

 

IUPAC name is hex-4-ene

The empirical formula is CH2

It is an isomer of cyclohexane

A

B

C

D

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81 mark

Which of the molecules shown below contains an aldehyde functional group?

  • CH3CH2CH2COCH3

  • CH3CH2OOCH3

  • H3CH2OCH2CH2CH2CH3

  • CHOCH2CHOHCH2CH3

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91 mark

Which of the formulas below shows a tertiary halogenoalkane?

  • CH3CH2CH2I

  • C(CH3)3Cl

  • CH3CH2CH(CH3)Br

  • CH3CHClCH2CH3

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101 mark

What is the correct name for this isomer?

q10-medium-3-1-introduction-to-organic-chemistry

  • Z-1,2-dibromopropene

  • Z-1,2-dibromoethene

  • E-1,2-dibromoethane

  • Z-1,4-dibromoethene

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