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.
1
2
3
4
Correct answer is C
Ozone means Oz as the atomicity is 3. Option A,B,D cannot give ozone because their atomicity is not 3
efflorescence
déliquescence
effervescence
fluorescence
Correct answer is A
Efflorescence is a process of long exposure to the atmosphere which favors salt loss of water. Options B, C, D are not related to loss of water
distillation
sublimation
precipitation
evaporation
Correct answer is B
Sublimation is the transformation of solid gaseous state without passing through the liquid state. Options A,C,D do not show case these character of sublimation as they do not bye pass states. They are in a particular order
The acid in electrolysis of water is dilute
HNO3
CH3COOH
H2SO4
HCl
Correct answer is C
HeSO4 is the acid used in the electrolysis of water. Option A,B,D are concentrated acid and they will react with the water
Vulcanization involve the removal of
monometer
the single bond
the double bond
a polymer
Correct answer is C
Vulcanizer is the removal of double bend in a chemical reaction. Option A,B,D can not be removed by vulcanizer