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.
are positively charged
are negatively charged
Have mass
travel in straight lines
Correct answer is D
Rays travels in straight lines and finds its way through any opening available. It could be refracted, reflected or transmitted based on any obstacle. Option A,B,C are not the reason why the cathode are coasted shadows
An elements used in production of matches is
nitrogen
aluminum
copper
sulphur
Correct answer is D
Sulphur is an element that burns with a strongly explosive smell, as a result it is explosive smell
Which of the noble gases has the greatest ionization energy
He
Xe
Ar
Rr
Correct answer is A
Ionization energy: The amount of energy required to remove an electron from an isolated atom or molecule.
Trends down group :
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