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JAMB Chemistry questions

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

AllJAMBWAEC
All topicsAcids, bases and salts · 32Air · 21Atomic structure and bonding · 33Chemical combination · 31Chemical equilibrium · 21Chemistry and industry · 18Electrolysis · 22Energy changes · 22Environmental pollution · 17Kinetic theory of matter and gas laws · 27Metals and their compounds · 24Non-metals and their compounds · 23Organic compounds · 43Oxidation and reduction · 22Rates of chemical reaction · 22Separation of mixtures and purification · 24Solubility · 20Water · 21

  1. Question 281· Non-metals and their compounds· JAMB

    A solution gives a white precipitate with barium chloride that does not dissolve in dilute hydrochloric acid. The solution contains

    Explanation and discussion

  2. Question 282· Non-metals and their compounds· JAMB

    Ammonia gas and hydrogen chloride gas react to form white fumes of

    Explanation and discussion

  3. Question 283· Non-metals and their compounds· JAMB

    Nitrogen(IV) oxide gas is

    Explanation and discussion

  4. Question 284· Non-metals and their compounds· JAMB

    Sulphur(IV) oxide bleaches coloured substances mainly by

    Explanation and discussion

  5. Question 285· Non-metals and their compounds· JAMB

    A gas that burns with a 'pop' when a lighted splint is applied is

    Explanation and discussion

  6. Question 286· Non-metals and their compounds· JAMB

    Nitrogen is used in food packets because it

    Explanation and discussion

  7. Question 287· Non-metals and their compounds· JAMB

    Large quantities of nitrogen are used in the manufacture of

    Explanation and discussion

  8. Question 288· Non-metals and their compounds· JAMB

    White phosphorus is stored under water because it

    Explanation and discussion

  9. Question 289· Non-metals and their compounds· JAMB

    Oxygen is prepared in the laboratory by heating potassium trioxochlorate(V) with manganese(IV) oxide. The manganese(IV) oxide acts as

    Explanation and discussion

  10. Question 290· Non-metals and their compounds· JAMB

    When concentrated tetraoxosulphate(VI) acid is added to sugar, the sugar turns black because the acid acts as a

    Explanation and discussion

  11. Question 291· Non-metals and their compounds· JAMB

    The Ostwald process manufactures

    Explanation and discussion

  12. Question 292· Organic compounds· JAMB

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

    Explanation and discussion

  13. Question 293· Organic compounds· JAMB

    The functional group of carboxylic acids is

    Explanation and discussion

  15. Question 295· Organic compounds· JAMB

    The reaction of methane with chlorine requires

    Explanation and discussion

  16. Question 296· Organic compounds· JAMB

    Which of the following compounds will decolourise bromine water?

    Explanation and discussion

  17. Question 297· Organic compounds· JAMB

    Ethanol oxidised by acidified potassium heptaoxodichromate(VI) first gives

    Explanation and discussion

  18. Question 298· Organic compounds· JAMB

    The products of the complete combustion of ethane are

    Explanation and discussion

  19. Question 299· Organic compounds· JAMB

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

    Explanation and discussion

  20. Question 300· Organic compounds· JAMB

    The complete hydrolysis of starch produces

    Explanation and discussion

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