JAMB Chemistry questions

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

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

Question 41· Air· JAMB
In the fractional distillation of liquid air, the first gas to boil off is nitrogen because it has the
Explanation and discussion
Question 42· Air· JAMB
Argon makes up about what percentage of the air by volume?
Explanation and discussion
Question 43· Air· JAMB
The most abundant gas in the atmosphere is:
Explanation and discussion
Question 44· Air· JAMB
Iron rusts only when it is exposed to
Explanation and discussion
Question 45· Air· JAMB
Weather balloons are filled with helium because it is
Explanation and discussion
Question 46· Air· JAMB
Liquid air is fractionally distilled mainly to obtain
Explanation and discussion
Question 47· Air· JAMB
In terms of oxygen, the rusting of iron is
Explanation and discussion
Question 48· Air· JAMB
The part of the air that supports combustion is
Explanation and discussion
Question 49· Air· JAMB
The rusting of iron in moist air is an example of
Explanation and discussion
Question 50· Air· JAMB
The noble gases are unreactive because
Explanation and discussion
Question 51· 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
Question 52· Air· JAMB
Two gases that contribute most to global warming are
Explanation and discussion
Question 53· Air· JAMB
Which noble gas in the air is used to fill electric light bulbs?
Explanation and discussion
Question 54· Atomic structure and bonding· JAMB
How many neutrons are in an atom of ³⁷₁₇Cl?
Explanation and discussion
Question 55· Atomic structure and bonding· JAMB
Covalent molecular compounds usually
Explanation and discussion
Question 56· Atomic structure and bonding· JAMB
How many electrons are in a sodium ion, Na⁺? (Atomic number of Na = 11)
Explanation and discussion
Question 57· Atomic structure and bonding· JAMB
Elements in the same group of the periodic table have the same number of
Explanation and discussion
Question 58· Atomic structure and bonding· JAMB
What is the mass number of the atom shown in the diagram?
Explanation and discussion
Question 59· Atomic structure and bonding· JAMB
The maximum number of electrons that the third shell (n = 3) can hold is
Explanation and discussion
Question 60· Atomic structure and bonding· JAMB
Electronegativity increases across a period mainly because
Explanation and discussion

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JAMB Chemistry questions

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

Argon makes up about what percentage of the air by volume?

The most abundant gas in the atmosphere is:

Iron rusts only when it is exposed to

Weather balloons are filled with helium because it is

Liquid air is fractionally distilled mainly to obtain

In terms of oxygen, the rusting of iron is

The part of the air that supports combustion is

The rusting of iron in moist air is an example of

The noble gases are unreactive because

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

Two gases that contribute most to global warming are

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

How many neutrons are in an atom of ³⁷₁₇Cl?

Covalent molecular compounds usually

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

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

What is the mass number of the atom shown in the diagram?

The maximum number of electrons that the third shell (n = 3) can hold is

Electronegativity increases across a period mainly because