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.
Which of the following statements is correct?
Covalent compounds would readily ionize in solution
Covalent compounds consist of ions
Hydrogen bond is formed between a metal and a non-metal
Ionic compounds in solution would conduct electricity
Correct answer is D
One of the common features of materials with ionic bonds is that they conduct electricity when dissolved in water.
The ionization energy is affected by the following factors except
distance of the outermost electron(s) from the nucleus
size of the positive nuclear charge
ability to attract shared electron(s)
screening effect of the inner electron(s)
Correct answer is C
These 3 factors affect the ionization energy:
The oxidation number of X in \(XO_{4}^{3-}\) is
+1
+3
+4
+5
Correct answer is D
\(XO_{4}^{3+}\) = \(X + (-2\times 4) = -3\)
\(X = -3+8 = +5\)
Which of the following substances does not have van der Waals' forces?
Copper
Graphite
Neon
Iodine crystals
Correct answer is A
No explanation has been provided for this answer.
Which of the following metals has the strongest metallic bond?
\(_{13}Al\)
\(_{19}K\)
\(_{12}Mg\)
\(_{11}Na\)
Correct answer is A
Aluminium has the highest magnitude of charge of +3, hence it will form a stronger metallic bond.