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 bonds in crystaline ammonium chloride are?
covalent and dative
ionic and covalent
ionic covalent and dative
ionic covalent and hydrogen bond
Correct answer is C
The formula for ammonium chloride is NH4Cl. The bond between the ammonium ion (NH4Cl+) are IONIC, COVALENT and DATIVE.
Which of the following molecules has a triple bond in its structure?
CH4
NH3
N2
O 2
Correct answer is C
No explanation has been provided for this answer.
Which of the following molecules has a linear shape?
CH4
CO 2
H2S
NH 3
Correct answer is B
No explanation has been provided for this answer.
A solid substance with high melting and boiling points is likely to be a/an
covalent compound
dative covalent compound
electrovalent compound
non-metal
Correct answer is C
No explanation has been provided for this answer.
Which of the following species correctly represented an ion of M with 13 protons and 10 electrons?
10M 3+
10M 3-
13M 3+
13M 3-
Correct answer is C
No explanation has been provided for this answer.
If X is a group lll element, its oxide would be represented as
X3O2
X3O
X2O3
XO3
Correct answer is C
No explanation has been provided for this answer.
Which of the following statements about chlorine and iodine at room temperature is correct?
Chlorine is gas and iodine is solid
Chlorine is liquid and iodine is gas
Chlorine and iodine are gases
Chlorine is solid and iodine is liquid
Correct answer is A
No explanation has been provided for this answer.
Which of the following elements is a d-block element?
Calcium
lron
Lithium
Silicon
Correct answer is B
No explanation has been provided for this answer.
The energy change which accompanies the addition of an electron to a gaseous atom is
atomization
electron affinity
electronegativity
ionization
Correct answer is B
No explanation has been provided for this answer.
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