IBChemistry: SLDPExam Questions10. Organic Chemistry10.1 Fundamentals of Organic Chemistry

Syllabus Edition

First teaching 2014

Last exams 2024

|

Fundamentals of Organic Chemistry (DP IB Chemistry: SL)

Exam Questions

2 hours45 questions

Select a question set to download for
10.1 Fundamentals of Organic Chemistry

Select an answer set to view for
10.1 Fundamentals of Organic Chemistry

Easy
Medium
Hard
11 mark

Which pairs of homologous series do not have the same C:H ratio in their general formulae?

  • aldehydes and ketones

  • alkanes and alkenes

  • carboxylic acids and esters

  • alkenes and aldehydes

Choose your answer

Did this page help you?

21 mark

Which of the following molecules are hydrocarbons?

10-1-q2-ib-chemisrey-mcq

  • All

  • 1 and 2

  • 1, 2 and 3

  • 4 only

Choose your answer

Did this page help you?

31 mark

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

          A           

                     Molecular                          

         CH2FCH2C(CH3)CH3

B

Empirical

C5H9F

C

Displayed

 10-1-q3-ib-chemisrey-mcq

D

Skeletal

 

10-1-e-q3-ib-chemistry-mcq    

    Choose your answer

    Did this page help you?

    41 mark

    Considering only structural isomers, what is the number of alcohols of each type with the formula C5H12O?

                 

             primary        

           secondary      

          tertiary    

    A

    B

    C

    D

    3

    4

    4

    5

    3

    2

    3

    2

    2

    2

    1

    1

      Choose your answer

      Did this page help you?

      51 mark

      Which of the following is the displayed formula for ethylamine?

      10-1-q5-ib-chemisrey-mcq

        Choose your answer

        Did this page help you?

        61 mark

        Identify which of the hydrocarbons shown below does not belong in the same homologous series as the other compounds

        • C5H12

        • C6H12

        • C7H16

        • C8H18

        Choose your answer

        Did this page help you?

        71 mark

        Identify the functional group that is ringed in the molecule shown below:

        10-1-q7-ib-chemisrey-mcq

        • hydroxyl

        • carboxyl

        • ether

        • carbonyl

        Choose your answer

        Did this page help you?

        81 mark

        What is the IUPAC name of the following molecule?10-1-q8-ib-chemisrey-mcq

        •  2-chloro-3-ethylbutane

        • 3-methyl-4-chloropentane

        • 2-ethyl-3-chlorobutane

        • 2-chloro-3-methylpentane

        Choose your answer

        Did this page help you?

        91 mark

        What is the IUPAC name of the following molecule?10-1-q9-ib-chemisrey-mcq

        • 3,3-dimethylpropanoic acid

        • 1,1-dimethylpropanoic acid

        • 3-methylbutanoic acid

        • 2-methylbutanoic acid

        Choose your answer

        Did this page help you?

        101 mark

        Which of the halogenoalkanes shown contains a secondary carbon atom?

        • (CH3)2CHCH2Cl

        • CH3(CH2)3CH2Cl

        • (CH3)3CCl

        • CH3CHClCH2CH3

        Choose your answer

        Did this page help you?

        11 mark

        How many structural isomers are there of tribromopropane, C3H5Br3?

        • 4

        • 5

        • 6

        • 7

        Choose your answer

        Did this page help you?

        21 mark

        How many isomeric esters have the molecular formula C5H10O2?

        • 4

        • 5

        • 9

        • 7

        Choose your answer

        Did this page help you?

        31 mark

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

        1.  all members have the same general formul
        2.  the members have similar chemical properties
        3.  the members show a gradual change in physical properties

        • I and II only

        • I and III only

        • II and III only

        • I, II and III

        Choose your answer

        Did this page help you?

        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)2CHCH(CH2)2(CH3)2

        • CH3(CH2)5CH3

        • CH3CHCHCH(CH2)2(CH3)2

        Choose your answer

        Did this page help you?

        51 mark

        Give the name of the following molecule10-1-m-q5-mcqs-ib-chemistry

        • 2,4,4,4-trimethylethylbutane

        • 3,3,5-trimethylhexane

        • 2,4,4-trimethylhexane

        • 1,1,3,3-tetramethylpentane

        Choose your answer

        Did this page help you?

        61 mark

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

        • 2

        • 3

        • 4

        • 5

        Choose your answer

        Did this page help you?

        71 mark

        Study the diagram below and determine which of the three statements are correct

        10-1-m-q8-mcqs-ib-chemistry

        1.   A suitable name is hex-4-ene
        2.   The empirical formula is CH2
        3.    It is an isomer of cyclohexane

        • I and II only

        • I and III only

        • II and III only

        • I, II and III

        Choose your answer

        Did this page help you?

        81 mark

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

        • CH3CH2CH2OOCH3 

        • CH3CH2CH2COCH3

        • CH3CH2OCH2CH3

        • CH3CH2CH2CH2CHO

        Choose your answer

        Did this page help you?

        91 mark

        Which of the halogenoalkanes shown below contains a tertiary carbon atom?

        • CH3CH2CH2Cl

        • CH3CH2CH(CH3)Br

        • C(CH3)3Cl

        • CH3CHBrCH2CH3

        Choose your answer

        Did this page help you?

        101 mark

        What would be the name of the following compound using IUPAC rules?

        10-1-m-q10-mcqs-ib-chemistry

        • pentane

        • ethylpropane

        • 2-methylbutane

        • 3-methylbutane

        Choose your answer

        Did this page help you?

        11 mark

        How many isomers, including structural and stereoisomers, with the formula C5H10 have structures that involve π bonding?

        • 3

        • 4

        • 5

        • 6

        Choose your answer

        Did this page help you?

        21 mark

        Study the formulae shown below and determine which molecules are isomers of each other

        I.
        CH3(CH2)3CH2CH3
        II.
        (CH3)2CHCH2CH3
        III.
        CH3CH(CH3)CH2CH2CH3

        • I and II only

        • I and III only

        • II and III only

        • I, II and III

        Choose your answer

        Did this page help you?

        31 mark

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

        • CH3CBr2CH(CH3)CH2CH2CH3

        • CH3CHBrCBr(CH3)CH2CH2CH3

        • CH3CBr2CH2CH(CH3)CH2CH3

        • CH3CHBrCH(CH3)CHBrCH2CH3

        Choose your answer

        Did this page help you?

        41 mark

        What is the correct IUPAC name for the molecule shown?

        10-1-h-q4-mcqs-ib-chemistry

        • ethoxyethane

        • methoxyethane

        • propanone

        • propanal

        Choose your answer

        Did this page help you?

        51 mark

        Which of the molecules shown below is not an isomer of pentan-2-ol?

        • pentan-1-ol

        • 2-methylbutan-2-ol

        • 2-methylpentan-2-ol

        • pentan-3-ol

        Choose your answer

        Did this page help you?

        61 mark

        Which of the following pairs are functional group isomers?

        I.
        CH3CH(OH)CH2CH2CH3 and CH3CH2CH(OH)CH2CH3
        II.
        CH3CH2CH2COOH and HCOOCH2CH2CH3
        III.
        CH3CH2CH2OH and CH3OCH2CH3

        • I and II only

        • I and III only

        • II and III only

        • I, II and III

        Choose your answer

        Did this page help you?

        71 mark

        The structure of benzene is often shown as

        10-1-h-q7i-mcqs-ib-chemistry

        This is a representation of a resonance hybrid structure that lies between these two possible structures

        10-1-h-q7ii-mcqs-ib-chemistry

        Evidence for this resonance structure is:

        1. The carbon-carbon bond lengths lie between the value for a single and a double bond
        2. The bond angles are all equal in benzene
        3. The enthalpy of hydrogenation of benzene is less exothermic than expected

        • I and II only

        • I and III only

        • II and III only

        • I, II and III

        Choose your answer

        Did this page help you?

        81 mark

        What is the correct name of the following molecule using IUPAC rules?

        10-1-h-q8-mcqs-ib-chemistry

        • propyl methanoate

        • methyl propanoate

        • methoxypropane

        • butoxymethanal

        Choose your answer

        Did this page help you?

        91 mark

        What types of isomerism can the following molecule show?

        10-1-h-q9-mcqs-ib-chemistry

        I.
        Branch-chain
        II.
        Positional 
        III.
        Functional group

        • I and II only

        • I and III only

        • II and III only

        • I, II and III

        Choose your answer

        Did this page help you?

        101 mark

        Which row of the table is correct about the trend and explanation in the boiling points of the alcohols CH3OH, C2H5OH and C3H7OH?



                    

                     Trend in boiling points                    

                                               Explanation                                                      

            A

        CH3OH ＞C2H5OH ＞ C3H7OH 

        The London dispersion forces decrease with each additional CH2

        B

        CH3OH ＞C2H5OH ＞ C3H7OH 

        The strength of the hydrogen bonds decreases with each additional CH2

        C

        C3H7OH ＞C2H5OH ＞CH3OH   

        The London dispersion forces increase with each additional CH2

        D

        C3H7OH ＞C2H5OH ＞CH3OH  

        The strength of the hydrogen bonds increases with each additional CH2

          Choose your answer

          Did this page help you?