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 oxidation number of phosphorus in PO 3/4 is
+1
+2
+3
+4
+5
Correct answer is E
No explanation has been provided for this answer.
Diluting the hydrochloric acid
Adding some distilled water
Decreasing the temperature
Grinding the metal into powder
Increasing the pressure
Correct answer is D
No explanation has been provided for this answer.
Which of the following is not a property of magnesium oxide?
High melting point
Dissolution in polar solvents
Presence of ionic bonds
Possession of crystal lattice
Low binding energy
Correct answer is E
No explanation has been provided for this answer.
definite proportion
conservation of matter
reciprocal proportions
constant composition
Correct answer is B
No explanation has been provided for this answer.
A measure of the degree of disorder in a chemical system is known as the
enthalpy
free energy
activation energy
entrophy
equilibrium
Correct answer is D
No explanation has been provided for this answer.