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.
The most electropositive elements among the following is
Na
Ca
K
Cs
Correct answer is D
No explanation has been provided for this answer.
H+
HO -
H2+
H3O+
Correct answer is D
No explanation has been provided for this answer.
The first metal used by man was
iron
copper
gold
bronze
Correct answer is B
No explanation has been provided for this answer.
The graphite rods in the nuclear reactor
react with U to release energy
produce neutrons
undergo combustion which triggers the nuclear fission
convert fast moving neutrons into thermal neutrons
Correct answer is D
No explanation has been provided for this answer.
The ionic radii of N3-, O2-, F- and Na+ follows the order
N3- > O2- > F- > Na+
N3- > Na+ > O2- > F-
Na+ > O2- > N3- > F-
O2- > F- > Na+ > N3-
Correct answer is A
No explanation has been provided for this answer.