JAMB and WAEC Chemistry questions: Organic compounds

72 questions with answers and explanations. Tap an option to check yourself.

1. Question 41· Organic compounds· WAEC

   Polythene is made by

   • Acracking of starch
   • Bcondensation of glucose
   • Cfermentation
   • Daddition polymerisation of ethene

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   Explanation and discussion

2. Question 42· Organic compounds· JAMB

   Structural isomers have

   • Adifferent molecular formulae
   • Bthe same structural formula
   • Cthe same molecular formula but different structural formulae
   • Didentical properties

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   Explanation and discussion

3. Question 43· Organic compounds· JAMB

   The reaction between an alkanoic acid and an alkanol to form an ester is catalysed by

   • Anickel
   • Bsodium hydroxide
   • Cconcentrated tetraoxosulphate(VI) acid
   • Dyeast

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4. Question 44· Organic compounds· WAEC

   The functional group of alkanoic acids is

   • AC=C
   • B–OH
   • C–CHO
   • D–COOH

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5. Question 45· Organic compounds· JAMB

   The IUPAC name of CH₃CH(CH₃)CH₃ is

   • A2-methylbutane
   • Bbutane
   • C1-methylpropane
   • D2-methylpropane

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6. Question 46· Organic compounds· JAMB

   The monomer of polyvinyl chloride (PVC) is

   • Aethene
   • Bchloroethene
   • Cchloroethane
   • Dpropene

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   Explanation and discussion

7. Question 47· Organic compounds· JAMB

   In the laboratory, ethyne is prepared by adding water to

   • Azinc granules
   • Bcalcium carbonate
   • Csodium chloride
   • Dcalcium carbide

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8. Question 48· Organic compounds· WAEC

   The reaction between an alkanoic acid and an alkanol produces

   • Acarbon dioxide and water
   • Ba salt and water
   • Can alkene
   • Dan ester and water

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   Explanation and discussion

9. Question 49· Organic compounds· JAMB

   The conversion of ethene into polythene is an example of

   • Afermentation
   • Bcondensation polymerisation
   • Ccracking
   • Daddition polymerisation

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10. Question 50· Organic compounds· JAMB

    The general formula of alkanes is:

    • ACₙH₂ₙ
    • BCₙH₂ₙ₋₂
    • CCₙH₂ₙ₊₂
    • DCₙHₙ

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11. Question 51· Organic compounds· WAEC

    Which of these is used to test for unsaturation in a hydrocarbon?

    • Alime water
    • Bbromine water
    • CFehling's solution
    • Diodine solution

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    Explanation and discussion

12. Question 52· Organic compounds· JAMB

    Ethanol warmed with excess acidified potassium heptaoxodichromate(VI) is oxidised to

    • Aethane
    • Bethene
    • Cethanoic acid
    • Dmethanol

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13. Question 53· Organic compounds· JAMB

    The functional group of the alkenes is

    • Athe carbon–carbon double bond
    • B–OH
    • C–COOH
    • Dthe carbon–carbon triple bond

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14. Question 54· Organic compounds· WAEC

    The general formula of the alkanes is

    • ACₙH₂ₙ
    • BCₙH₂ₙ₊₂
    • CCₙH₂ₙ₋₂
    • DCₙH₂ₙ₊₁OH

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15. Question 55· Organic compounds· JAMB

    Ethyne (acetylene) is used in

    • Afertilisers
    • Bmaking soap
    • Coxy-acetylene welding
    • Dcooling refrigerators

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16. Question 56· Organic compounds· WAEC

    The next member of the alkane series after propane is

    • Apentane
    • Bethane
    • Cbutane
    • Dpropene

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17. Question 57· Organic compounds· WAEC

    Saponification is the

    • Afermentation of sugar
    • Bmaking of polythene
    • Calkaline hydrolysis of fats to make soap
    • Dcracking of oil

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18. Question 58· Organic compounds· WAEC

    How many structural isomers has butane, C₄H₁₀?

    • A4
    • B1
    • C3
    • D2

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19. Question 59· Organic compounds· JAMB

    The homologous series with the general formula CₙH₂ₙ₋₂ is the

    • Aalkanes
    • Balkynes
    • Calkenes
    • Dalkanols

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20. Question 60· Organic compounds· WAEC

    Which of the following is produced by the fermentation of glucose?

    • AEthene
    • BMethanol
    • CEthanoic acid
    • DEthanol

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    Explanation and discussion