Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
A reversible reaction
A spontenous reaction
An endothermic reaction
An exothermic reaction
Correct answer is D
In salts for which the hydration energy is higher than the lattice energy, solvation occurs with a release of energy in the form of heat. A reaction in which there is a release of energy as LIGHT OR HEAT is EXOTHERMIC.
The gas that is used for the treatment of cancer is
Neon
Radon
Xenon
Argon
Correct answer is B
No explanation has been provided for this answer.
0.056dm3
0.224dm3
224.000dm3
56.000dm3
Correct answer is A
Q = 193 x 5 = 965C
40H ↦ 2H2O + O2 + 4e
4 x 96500C = 22.4dm3
965C = x
x = 22.4×9654×96500
= 0.056dm3
An isotope has an atomic number of 15 and a mass number of 31. The number of proton it contains is
16
15
31
46
Correct answer is B
No explanation has been provided for this answer.
An example of a solid emulsion is
Butter
Hair cream
Milk
Cod-liver oil
Correct answer is A
No explanation has been provided for this answer.