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.
Sodium chloride is used in the following processes except in the
treatment of polluted water
preservation of food
separation of soap from glycerol
manufacture of chlorine
manufacture of caustic soda
Correct answer is A
No explanation has been provided for this answer.
hydrogen bonding
metallic bonding
covalent bonding
ionic bonding
van der Waals' forces
Correct answer is A
No explanation has been provided for this answer.
Reducing agent
A bleaching agent
A dehydrating agent
A sulphonating agent
An oxidizing agent
Correct answer is A
No explanation has been provided for this answer.
Which of the following reactions is accompanied by the first ionization energy of an element X?
X +(aq) → X 2+ (aq) + e-
X - (g) → X(g) + e-
X+ (g) → X2+ +e-
X (g) → X+ (g) +e-
X(s) → X + (g) + e-
Correct answer is D
ionization energy (IE) is the minimum energy required to remove an isolated gaseous atom's most loosely bound electron. The first ionization energy is quantitatively expressed as
\(X_{(g)} + energy ⟶ X^+_{(g)} + e^−\)
where X is any atom or molecule, \(X^+\) is the resultant ion when an electron( \(e^−\)) was removed from the original atom.
The following compounds will decompose on heating except
NaHCO3
K2CO3
MgCO3
Ca(HCO3)2
ZnCO3
Correct answer is B
No explanation has been provided for this answer.