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 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.