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.
Diamond does not conduct electricity because it?
has no free valence electrons
is a giant molecule
contains no bonded electrons
is a solid at room temperature
Correct answer is A
It does not conduct electricity. Every atom in a diamond is bonded to its neighbours by four strong covalent bonds, leaving no free electrons and no ions .
The collision theory proposes that
reactants collide more frequently to bring about reduction in the reaction rate
all collisions of reactants are effective
reactants must collide with a certain minimum amount of energy to from products
the fewer the collisions the faster the reaction rate
Correct answer is C
No explanation has been provided for this answer.
When concentrated H2
SO 4 is added to NaCI (s), the gas evolved
bleaches damp blue litmus paper
forms a white preciptate with AgNO3(aq)
forms a white precipitate with BaCI2(aq)
turns moist red litmus paper blue
Correct answer is A
No explanation has been provided for this answer.
number of the collisions between the gas molecules and the walls of the container
kinetic energy of the gas
number of collisions between the gas molecules
number of repulsion between the gas molecules
Correct answer is A
No explanation has been provided for this answer.
Chlorine
Hydrogen
Neon
Oxygen
Correct answer is A
No explanation has been provided for this answer.