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 luster of a metal is due to
its high density
its high polishing
its chemical inertness
presence of free electrons
Correct answer is D
No explanation has been provided for this answer.
vinyl chloride
ethylene
ethyl alcohol
None of the above
Correct answer is B
No explanation has been provided for this answer.
The main use of salt in the diet is to
make the taste of food better
produce in small amounts the hydrochloric acid required for the digestion of food
ease the process of cooking
increase the solubility of food particles in water
Correct answer is B
No explanation has been provided for this answer.
How many moles of CO2 contains 16g of Oxygen?
0.5 mole
0.2 mole
0.4 mole
0.25 mole
Correct answer is A
One mole of CO2 has mass of 44 g and 32 g of O2. So 16 g of O2 have 22 g of CO2 or 0.5 moles of it.
The heat energy produced when the human body metabolises 1 gram of fat is
30 KJ
1 KJ
39 KJ
29 KJ
Correct answer is C
No explanation has been provided for this answer.