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.
Hard water is water with high concentrations of dissolved ions, in particular calcium and
| GAS | CO\(_2\) | N\(_2\) |
O\(_2\) |
| % BY VOLUME | 4 | 72 | 24 |
The above table shows the compositions of the atmosphere of planet X. Which of these gases are present in higher percentages on earth?
What volume of (dm\(^3\)) of water will be added to 10dm\(^3\) of 2.0 mol/dm\(^3\) HCL acid solution to give a final solution of 0.5 mol/dm\(^3\)?
Alkanes are used mainly?
2-methylprop-1-ene is a structural isomer of?
How many bonding pair are present in carbon(iv)oxide?
In the extraction of iron, hot air is introduced into the blast furnace through?
Wrought iron is obtained by heating cast iron in a furnace with?
Electrons enter into orbitals in order of increasing energy as exemplified by?
H\(^+\) + OH\(^-\) → H\(_2\)O
The equation above illustrates
Which of the following best represent solid gas mixture?
When heat is absorbed during a chemical reaction, the reaction is said to be
The dehydration of CH\(_3\)CH\(_2\)CH\(_2\)CH\(_2\)OH will give?
The pollutant usually presents in a city which generates its electricity from coal?
The reactions below represent neutralization reaction, in which of them is the value of ΔH highest?
If the volume of a given mass of a gas at 0ºc is 29.5cm\(^3\). What will be the volume of the gas at 15ºc, given that the pressure remains constant.
In which of the following will hydrogen form ionic compound?
2H\(_2\) + O\(_2\) → 2H\(_2\)O
From the equation above, calculate the volume of unreacted oxygen gas if a mixture of 50cm\(^3\) of hydroden and 75cm\(^3\) of oxygen are involved
An organic compound contains 69% carbon, 15.3% hydrogen and 30.7% oxygen. Calculate the the empirical formula [C=12, H = 1, O = 16]
Crude petroleum is converted to useful products by the process of?