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 property which makes alcohol soluble in water is the
boiling point
hydrogen bonding
ionic character
covalent nature
Correct answer is B
No explanation has been provided for this answer.
The furring of kettles is caused by the presence in the water of?
Calcium tetraoxosulphate (VI)
Calcium hydrogentrioxocarbonate (IV)
Calcium hydroxide
Calcium trioxocarbonate (IV)
Correct answer is D
The furring of kettles or boilers - this is as a result of the decomposition of \(Ca(HCO_3)_2\) into \(CaCO_3\), and this\(CaCO_3\) coats the inside of a kettle or boiler used in heating water containing dissolved \(Ca(HCO_3)_2\).
The substance least considered as a source of environmental pollution is
Lead compounds
Organophosphorous compounds
Silicate minerals
Uranium
Correct answer is C
No explanation has been provided for this answer.
0.5 mol dm3
0.6 mol dm3
0.2 mol dm3
0.4 mol dm3
Correct answer is A
No explanation has been provided for this answer.
Close to that of pure water
Unaltered
Greater than 8.4
Less than 8.4
Correct answer is C
A strong base is one that fully dissociates to give ions in solution. Weak bases only partially dissociate in a solution,
while the strong bases dissociate fully in a solution. Weak bases have pH 7.3 – 10, strong ones have pH 10 – 14.