JAMB and WAEC Chemistry questions

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

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

Question 101· Atomic structure and bonding· WAEC
The bond between sodium and chlorine in sodium chloride is
Explanation and discussion
Question 102· Atomic structure and bonding· WAEC
Element X is in Group II and Period 3 of the Periodic Table. X is
Explanation and discussion
Question 103· Atomic structure and bonding· JAMB
What is the mass number of the atom shown in the diagram?
Explanation and discussion
Question 104· Atomic structure and bonding· JAMB
The maximum number of electrons that the third shell (n = 3) can hold is
Explanation and discussion
Question 105· Atomic structure and bonding· WAEC
Chlorine consists of ³⁵Cl (75%) and ³⁷Cl (25%). Calculate its relative atomic mass.
Explanation and discussion
Question 106· Atomic structure and bonding· WAEC
Which of these compounds is covalent?
Explanation and discussion
Question 107· Atomic structure and bonding· WAEC
The bond formed when both shared electrons come from one atom is
Explanation and discussion
Question 108· Atomic structure and bonding· WAEC
Which pair of elements is most likely to form an ionic compound?
Explanation and discussion
Question 109· Atomic structure and bonding· JAMB
Electronegativity increases across a period mainly because
Explanation and discussion
Question 110· Atomic structure and bonding· JAMB
Rutherford's gold-foil experiment showed that the atom
Explanation and discussion
Question 111· Atomic structure and bonding· WAEC
An atom has atomic number 11 and mass number 23. The number of neutrons in it is
Explanation and discussion
Question 112· Atomic structure and bonding· JAMB
Which quantum number describes the shape of an orbital?
Explanation and discussion
Question 113· Atomic structure and bonding· JAMB
The electron was discovered by
Explanation and discussion
Question 114· Atomic structure and bonding· JAMB
Water has an unusually high boiling point for its molecular size mainly because of
Explanation and discussion
Question 115· Atomic structure and bonding· JAMB
The diagram represents an atom of
Explanation and discussion
Question 116· Atomic structure and bonding· JAMB
The shape of the water molecule is
Explanation and discussion
Question 117· Atomic structure and bonding· JAMB
An element with electronic configuration 2, 8, 7 belongs to group
Explanation and discussion
Question 118· Atomic structure and bonding· JAMB
An atom has mass number 27 and 14 neutrons. How many electrons are in its outermost shell?
Explanation and discussion
Question 119· Atomic structure and bonding· WAEC
Sodium chloride has a high melting point because of
Explanation and discussion
Question 120· Atomic structure and bonding· JAMB
The electronic configuration of an element with atomic number 12 is:
Explanation and discussion

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

Start a Chemistry test

JAMB and WAEC Chemistry questions

The bond between sodium and chlorine in sodium chloride is

Element X is in Group II and Period 3 of the Periodic Table. X is

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

Chlorine consists of ³⁵Cl (75%) and ³⁷Cl (25%). Calculate its relative atomic mass.

Which of these compounds is covalent?

The bond formed when both shared electrons come from one atom is

Which pair of elements is most likely to form an ionic compound?

Electronegativity increases across a period mainly because

Rutherford's gold-foil experiment showed that the atom

An atom has atomic number 11 and mass number 23. The number of neutrons in it is

Which quantum number describes the shape of an orbital?

The electron was discovered by

Water has an unusually high boiling point for its molecular size mainly because of

The diagram represents an atom of

The shape of the water molecule is

An element with electronic configuration 2, 8, 7 belongs to group

An atom has mass number 27 and 14 neutrons. How many electrons are in its outermost shell?

Sodium chloride has a high melting point because of

The electronic configuration of an element with atomic number 12 is: