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 number of unpaired electrons in an atom of an element 8Q is _______?
2
4
6
8
Correct answer is A
No explanation has been provided for this answer.
The alkaline earth metals have similar chemical properties because________?
They are in the same period
Their salts are colourless
They have the same number of valence electrons
They are very reactive
Correct answer is C
No explanation has been provided for this answer.
Which of the following halogens is solid at room temperature?
Bromine
Chlorine
Flourine
Iodine
Correct answer is D
No explanation has been provided for this answer.
The gas given off when ethanol reacts with sodium is
Carbon(IV)oxide
Hydrogen
Methane
Oxygen
Correct answer is B
No explanation has been provided for this answer.
The following transition metal ions would be coloured in aqueous solution except________?
Cr3+
Fe3+
Mn3+
Sc3+
Correct answer is D
No explanation has been provided for this answer.