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 reason for the decrease in the atomic size of elements across a period is that
The property of elements which increases down a group of the periodic table is
Atomic orbital is
The mass of one mole of \((NH_{4})_{2}CO_{3}\) is [O=16.0, N=14.0, C=12.0, H=1.0]
The purity of a solid sample can best be determined by its
The seperation of Nitrogen from oxygen using fractional distillation of air is possible because
The species with no electron in the 3d-orbital is
Pauli exclusion principle is related to
The following glasswares are used to measure the volume of liquids EXCEPT
Which of the following species determines the chemical properties of an atom?
X(g) + 3Y(g) ---- 2z(g) H = +ve. if the reaction above takes place at room temperature, the G will be
Ca(OH)2(s) + 2NH4Cl(s) → CaCl2(s) + 2H2O(l) + X. In the reaction above X is
Calculate the amount in moles of a gas which occupies 10.5 dm3 at 6 atm and 30oC [R = 0.082 atm dm3 K-1 mol-1]
A particle that contains 9 protons, 10 neutrons and 10 electrons is