Study and practice Chemistry past questions with answers and detailed explanations. Then test your knowledge using our interactive CBT practice platform and prepare confidently for your upcoming examinations.
Create and set up a CBT environment with your preferred subjects.
Practice JAMB CBT with real UTME past questions in CBT format.
CB-WASSCE styled past question practice.
SSCE & GCE styled past question practice.
The part of the total energy of a system that accounts for the useful work done in a system is known as
When the end alkyl groups of ethyl ethanoate are interchanged, the compound formed is
An element Z contains 80% of \(^{16} _8\)Z and 20% of \(^{18} _8\)Z. Its relative atomic mass is
How many electrons will be found in the nucleus of an atom with mass number 23 and 17 neutrons?
A solution X, on mixing with AgNO\(_3\) solution gives a white precipitate soluble in aqueous NH\(_3\), a solution Y, when also added to X, also gives a white precipitate which is soluble when heated solutions X and Y respectively contain
The reaction \(2H_2 S + SO_2 \to 3S + 2H_2 O\) is
How many alkoxyalkanes can be obtained from the molecular formula C\(_4\)H\(_{10}\)O?
The cost of discharging 6.0g of a divalent metal, X from its salt is ₦12.00. What is the cost of discharging 9.0g of a trivalent metal, Y from its salt under the same condition?
[X = 63, Y = 27, 1F = 96,500C]
If the cost of electricity required to discharge 10g of an ion X\(^{3+}\) is N20.00, how much would it cost to discharge 6g of ion Y\(^{2+}\)?
[1 faraday = 96,500C, atomic masses are X = 27, Y = 24]
Hydrogen diffused through a porous plug
The emission of two successive beta particles from the nucleus \(^{32} _{15} P\) will produce
The velocity, V of a gas is related to its mass, M by (k = proportionality constant)
X is a substance which liberates CO\(_2\) on treatment with concentrated H\(_2\)SO\(_4\). A warm solution of X can decolorize acidified KMnO\(_4\). X is
Which of the following conditions will most enhance the spontaneity of a reaction?
200cm\(^3\) of 0.50mol/dm\(^3\) solution of calcium hydrogen trioxocarbonate (IV) is heated. The maximum weight of solid precipitated is
Which of the following sets of operation will completely separate a mixture of sodium chloride, sand and iodine?
Methane is prepared in the laboratory by heating a mixture of sodium ethanoate with soda lime. The chemical constituent(s) of soda lime is/are
Hydrogen bond is a sort of
The oxidation state(s) of nitrogen in ammonium nitrite is/are
Which quantum divides shells into orbitals?