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.
Flow of current in electrolytes is due to the movement of
electrons
Holes and electron
Ions
Charges
Correct answer is C
No explanation has been provided for this answer.
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
The weakest attractive force that can be observed between two molecules is
ionic
covalent
co-ordinate covalent
vander Waals
Correct answer is D
Vander Waals are the weakest attractive forces that exist between two molecules. Option A,B,C are not weak forces because the force attraction that exist between their interested molecule are very strong
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.
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