JAMB Chemistry questions

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

1. Question 301· Organic compounds· JAMB

   The general formula of the alkanols is

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

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2. Question 302· Organic compounds· JAMB

   The reaction between methane and chlorine in sunlight is

   • Aesterification
   • Baddition
   • Cpolymerisation
   • Dsubstitution

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3. Question 303· 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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4. Question 304· Organic compounds· JAMB

   Acidified potassium tetraoxomanganate(VII) is decolourised by

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

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5. Question 305· Organic compounds· JAMB

   The functional group of the alkanoic acids is

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

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6. Question 306· Organic compounds· JAMB

   The compound CH₃COOH is:

   • Aethanoic acid
   • Bethanal
   • Cethanol
   • Dmethanoic acid

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7. Question 307· Organic compounds· JAMB

   Benzene undergoes mainly

   • Aaddition reactions only
   • Bsubstitution reactions
   • Cpolymerisation
   • Delimination

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8. Question 308· 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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9. Question 309· 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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10. Question 310· Organic compounds· JAMB

    Benzene mainly undergoes

    • Aaddition reactions
    • Bsubstitution reactions
    • Cpolymerisation
    • Dhydrolysis

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11. Question 311· Organic compounds· JAMB

    The hydration of ethene produces

    • Aethane
    • Bethanol
    • Cethanoic acid
    • Dethanal

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12. Question 312· Organic compounds· JAMB

    A hydrocarbon contains 85.7% carbon and 14.3% hydrogen by mass. Find its empirical formula. (C = 12, H = 1)

    • ACH
    • BCH₃
    • CCH₂
    • DC₂H₅

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13. Question 313· Organic compounds· JAMB

    The ester formed when ethanoic acid reacts with ethanol is

    • Amethyl ethanoate
    • Bethyl methanoate
    • Cethyl ethanoate
    • Dethanoic ethanol

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14. Question 314· Organic compounds· JAMB

    But-2-ene shows geometrical (cis-trans) isomerism because

    • Ait has a triple bond
    • Brotation about the C=C double bond is restricted
    • Cit is saturated
    • Dit has a ring

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15. Question 315· Organic compounds· JAMB

    The molecular formula of benzene is

    • AC₆H₁₄
    • BC₆H₁₂
    • CC₆H₆
    • DC₂H₆

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16. Question 316· Organic compounds· JAMB

    In the laboratory, methane is prepared by heating sodium ethanoate with

    • Aconcentrated sulphuric acid
    • Bsoda lime
    • Cwater
    • Dcopper

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17. Question 317· 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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18. Question 318· 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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19. Question 319· Organic compounds· JAMB

    The IUPAC name of CH₃CH(CH₃)CH₃ is

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

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20. Question 320· Organic compounds· JAMB

    The monomer of polyvinyl chloride (PVC) is

    • Aethene
    • Bchloroethene
    • Cchloroethane
    • Dpropene

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