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.
Noble gas molecules are held together by
van der Waals forces
hydrogen bonds
dative bonds
covalent bonds
Correct answer is A
No explanation has been provided for this answer.
Which of the following elements is diatomic?
Sodium
Oxygen
Iron
Neon
Correct answer is B
The seven diatomic elements are Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Iodine, Bromine.
The bonds in crystalline ammonium chloride are
covalent and dative
ionic and covalent
ionic, covalent and dative
ionic, covalent and hydrogen bond
Correct answer is C
N makes three covalent bonds with three Hydrogen and a coordinate (dative covalent) bond with with hydrogen ion, forming ammonium ion (NH\(_4 ^+\). The ammonium ion forms an ionic bond with chloride ion to form NH\(_4\)Cl.
In metallic solid, the forces of attraction is between the mobile valence electrons and the
atoms
neutrons
negative ions
positively charged nuclei
Correct answer is D
No explanation has been provided for this answer.
Which of the following bond types is responsible for the high boiling point of water?
Metallic bond
Covalent bond
lonic bond
Hydrogen bond
Correct answer is D
The high boiling point is due to the breaking of the intermolecular force called Hydrogen bond.