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.
Solubility is practically applied in
Fractional distillation
The determination of pH
The determination of saturation in hydrocarbons
Solvent extraction
Correct answer is D
No explanation has been provided for this answer.
Which of the following oxides can be reduced by hydrogen?
Aluminium oxide
Magnesium oxide
Sodium oxide
Silver oxide
Correct answer is D
Considering the electrochemical series, we can say that hydrogen can reduce only oxides of copper, mercury, silver, and gold as these metals are less reactive than hydrogen. The reduction of oxides of tin, iron, zinc, magnesium, calcium, and potassium is not possible by hydrogen as these metals are more reactive than hydrogen
Both large
Both negligible
Constant and negligible
Large and negligible
Correct answer is D
In a gas, the distance between molecules, whether monatomic or polyatomic, is very large compared with the size of the molecules; thus gases have a low density and are highly compressible.
Cohesive Force is negligible in case of gases.
