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.
When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called
ionic bond
electrovalent bond
covalent bond
co-ordinate bond
hydrogen bond
Correct answer is D
When one atom supplies both electrons in forming a two-electron bond, it is known as a dative covalent or coordinate bond. If two atoms contribute one electron each, it is known as a simple covalent bond. when ammonia and hydrogen ions bond together to form ammonium ion, the type of bond formed is a dative/coordinate covalent bond, because ammonia supplied both electrons with hydrogen contributing nothing.
Which of the following is not a member of the homologous series of the paraffins (alkanes)?
C3H8
C5H12
C7H16
C15H32
C24H48
Correct answer is E
Which of the following reactions does not take place in the smelting of iron in a blast furnace?
CaCO3(s)
C(s) + O2(g)
3FeCO(s) + 2OCO2(g)
SiO2(s) + CaO(s)
CO2(g) + C(s)
Correct answer is C
No explanation has been provided for this answer.
Which of the following gases may not be dried with concentrated sulphuric acid?
HCl
N2
Cl2
SO2
NH3
Correct answer is E
No explanation has been provided for this answer.
Tin
Zinc
Copper
Lead
Aluminium
Correct answer is C
No explanation has been provided for this answer.