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JAMB and WAEC Chemistry questions: Air

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

AllJAMBWAEC
All topicsAcids, bases and salts · 58Air · 37Atomic structure and bonding · 59Chemical combination · 58Chemical equilibrium · 37Chemistry and industry · 35Electrolysis · 41Energy changes · 38Environmental pollution · 32Kinetic theory of matter and gas laws · 45Metals and their compounds · 47Non-metals and their compounds · 45Organic compounds · 72Oxidation and reduction · 41Rates of chemical reaction · 38Separation of mixtures and purification · 42Solubility · 36Water · 39

  1. Question 1· Air· WAEC

    The components of air can be separated by

    Explanation and discussion

  2. Question 2· Air· WAEC

    Noble gases are used in electric bulbs because they are

    Explanation and discussion

  3. Question 3· Air· WAEC

    The gas in the air used for filling the space above food in packets to keep it fresh is

    Explanation and discussion

  4. Question 4· Air· JAMB

    Air is regarded as a mixture because

    Explanation and discussion

  5. Question 5· Air· WAEC

    The gas in the air that causes iron to rust together with water is

    Explanation and discussion

  6. Question 6· Air· WAEC

    Nitrogen is obtained industrially by

    Explanation and discussion

  8. Question 8· Air· WAEC

    The percentage of oxygen in air can be found by passing a measured volume of air over

    Explanation and discussion

  9. Question 9· Air· WAEC

    Water vapour in air can be detected by

    Explanation and discussion

  10. Question 10· Air· JAMB

    Which gas in the air do green plants use for photosynthesis?

    Explanation and discussion

  12. Question 12· Air· JAMB

    A candle burning in a closed jar soon goes out because

    Explanation and discussion

  13. Question 13· Air· JAMB

    The approximate percentage by volume of carbon(IV) oxide in clean air is

    Explanation and discussion

  14. Question 14· Air· JAMB

    Oxygen and nitrogen are obtained industrially from air by

    Explanation and discussion

  15. Question 15· Air· WAEC

    Air is passed over heated copper turnings and the copper turns black. This is because

    Explanation and discussion

  16. Question 16· Air· JAMB

    Which gas turns lime water milky but has NO effect on acidified potassium heptaoxodichromate(VI)?

    Explanation and discussion

  17. Question 17· Air· JAMB

    Incomplete combustion of fuels in a limited supply of air produces

    Explanation and discussion

  18. Question 18· Air· JAMB

    In the fractional distillation of liquid air, the first gas to boil off is nitrogen because it has the

    Explanation and discussion

  19. Question 19· Air· WAEC

    Approximately what percentage of dry air by volume is oxygen?

    Explanation and discussion

  20. Question 20· Air· WAEC

    Which noble gas is used in advertising signs because it glows red when electricity passes through it?

    Explanation and discussion

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