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.
23592U+10n→14556Ba+8836Kr+310n+Energy
The equation above represent a/an
alpha particle emission
endothermic reaction
nuclear fission
nuclear fusionthermal dissociation
Correct answer is C
No explanation has been provided for this answer.
Which of these compounds has the greatest ionic character?
AlF3
BF2
CF4
CsF
NaF
Correct answer is E
Sodium fluoride because, of all the metals listed, sodium is the most reactive while fluorine is the most reactive non-metal, distance between sodium and fluorine in the periodic table also is a factor
What kind of bond exist between carbon and oxygen in C03 2-?
Co- ordinate Covalent
covalent
Electrovalent
Metallic
Van der Waal forces
Correct answer is B
No explanation has been provided for this answer.
Which of the following compounds will undergo thermal dissociation?
AgCl
CaCO3
K2S04
NaOH
NH4CI
Correct answer is E
No explanation has been provided for this answer.
The rate of a reaction usually increases with increase in the concentration of reactants because the
distance between particles of the reactants increases
frequency of collision of particles is lower
particles of the reactants gain energy and move faster
reactants from a complex which decomposes rapidly
reactants occupy a higher energy level
Correct answer is D
No explanation has been provided for this answer.