AdmitMe
All subjects

JAMB and WAEC Chemistry questions

800 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 81· Air· JAMB

    The most abundant gas in the atmosphere is:

    Explanation and discussion

  2. Question 82· Air· JAMB

    Iron rusts only when it is exposed to

    Explanation and discussion

  3. Question 83· Air· JAMB

    Weather balloons are filled with helium because it is

    Explanation and discussion

  5. Question 85· Air· JAMB

    Liquid air is fractionally distilled mainly to obtain

    Explanation and discussion

  6. Question 86· Air· JAMB

    In terms of oxygen, the rusting of iron is

    Explanation and discussion

  7. Question 87· Air· JAMB

    The part of the air that supports combustion is

    Explanation and discussion

  8. Question 88· Air· WAEC

    Air is regarded as a mixture rather than a compound because

    Explanation and discussion

  9. Question 89· Air· WAEC

    When air is passed over heated copper, the copper turns black because

    Explanation and discussion

  10. Question 90· Air· JAMB

    The rusting of iron in moist air is an example of

    Explanation and discussion

  11. Question 91· Air· JAMB

    The noble gases are unreactive because

    Explanation and discussion

  12. Question 92· Air· JAMB

    100 cm³ of air is passed repeatedly over heated copper until there is no further change. The volume left is about

    Explanation and discussion

  13. Question 93· Air· JAMB

    Two gases that contribute most to global warming are

    Explanation and discussion

  14. Question 94· Air· WAEC

    The component of air that supports burning is

    Explanation and discussion

  15. Question 95· Air· JAMB

    Which noble gas in the air is used to fill electric light bulbs?

    Explanation and discussion

  16. Question 96· Atomic structure and bonding· WAEC

    The type of bond formed between sodium and chlorine is

    Explanation and discussion

  17. Question 97· Atomic structure and bonding· JAMB

    How many neutrons are in an atom of ³⁷₁₇Cl?

    Explanation and discussion

  18. Question 98· Atomic structure and bonding· JAMB

    Covalent molecular compounds usually

    Explanation and discussion

  19. Question 99· Atomic structure and bonding· JAMB

    How many electrons are in a sodium ion, Na⁺? (Atomic number of Na = 11)

    Explanation and discussion

  20. Question 100· Atomic structure and bonding· JAMB

    Elements in the same group of the periodic table have the same number of

    Explanation and discussion

Practise Chemistry like the real exam. A timed CBT, your score, and the topics to fix.

Start a Chemistry test