JAMB Chemistry questions: Organic compounds

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

1. Question 1· Organic compounds· JAMB

   The octane rating of petrol is improved by increasing the proportion of

   • Abranched-chain alkanes
   • Bstraight-chain alkanes
   • Cwater
   • Dsulphur compounds

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2. Question 2· Organic compounds· JAMB

   The functional group of carboxylic acids is

   • A–CO–
   • B–OH
   • C–CHO
   • D–COOH

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3. Question 3· Organic compounds· JAMB

   How many structural isomers has C₄H₁₀?

   • A4
   • B3
   • C2
   • D1

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4. Question 4· Organic compounds· JAMB

   The reaction of methane with chlorine requires

   • Aultraviolet light or sunlight
   • Ba nickel catalyst
   • Cwater
   • Ddarkness

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5. Question 5· Organic compounds· JAMB

   Which of the following compounds will decolourise bromine water?

   • AC₂H₆
   • BC₃H₈
   • CC₃H₆
   • DCH₄

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6. Question 6· Organic compounds· JAMB

   Ethanol oxidised by acidified potassium heptaoxodichromate(VI) first gives

   • Aethane
   • Bethene
   • Cethanal
   • Dmethanol

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7. Question 7· Organic compounds· JAMB

   The products of the complete combustion of ethane are

   • Acarbon and hydrogen
   • Bcarbon(IV) oxide and water
   • Ccarbon(II) oxide only
   • Dethene and hydrogen

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8. Question 8· Organic compounds· JAMB

   In the fermentation of sugar to ethanol, the enzymes are supplied by

   • Athe stomach
   • Bbacteria in milk
   • Cyeast
   • Dsaliva

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9. Question 9· Organic compounds· JAMB

   The complete hydrolysis of starch produces

   • Aamino acids
   • Bethanol
   • Cglycerol
   • Dglucose

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10. Question 10· Organic compounds· JAMB

    The general formula of the alkanols is

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

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11. Question 11· Organic compounds· JAMB

    The reaction between methane and chlorine in sunlight is

    • Aesterification
    • Baddition
    • Cpolymerisation
    • Dsubstitution

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12. Question 12· Organic compounds· JAMB

    Members of a homologous series

    • Ahave identical boiling points
    • Bhave the same molecular formula
    • Chave the same general formula and differ by CH₂
    • Dcontain no carbon

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13. Question 13· Organic compounds· JAMB

    Acidified potassium tetraoxomanganate(VII) is decolourised by

    • Aethene
    • Bethane
    • Cmethane
    • Dcarbon(IV) oxide

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14. Question 14· Organic compounds· JAMB

    The functional group of the alkanoic acids is

    • A–OH
    • B–COOH
    • C–CHO
    • D–COO–

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15. Question 15· Organic compounds· JAMB

    The compound CH₃COOH is:

    • Aethanoic acid
    • Bethanal
    • Cethanol
    • Dmethanoic acid

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16. Question 16· Organic compounds· JAMB

    Benzene undergoes mainly

    • Aaddition reactions only
    • Bsubstitution reactions
    • Cpolymerisation
    • Delimination

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17. Question 17· Organic compounds· JAMB

    The alkaline hydrolysis of fats and oils (saponification) produces

    • Amargarine
    • Bethanol and water
    • Csoap and glycerol
    • Desters only

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18. Question 18· Organic compounds· JAMB

    The reaction between an alcohol and a carboxylic acid produces:

    • Aan alkane
    • Ban alkene
    • Ca ketone
    • Dan ester and water

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19. Question 19· Organic compounds· JAMB

    Benzene mainly undergoes

    • Aaddition reactions
    • Bsubstitution reactions
    • Cpolymerisation
    • Dhydrolysis

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20. Question 20· Organic compounds· JAMB

    The hydration of ethene produces

    • Aethane
    • Bethanol
    • Cethanoic acid
    • Dethanal

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