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.
Which of the following physical properties decreases across the Periodic Table?
Ionization potenial
Electron affinity
Electronegativity
Atomic radius
Correct answer is D
No explanation has been provided for this answer.
20
18
16
2
Correct answer is A
No explanation has been provided for this answer.
coulombic
ionic
covalent
Van der waals
Correct answer is D
No explanation has been provided for this answer.
average velocity of the molecules
number of collisions between the molecules
density of the molecules
free mean path between each molecules and other
Correct answer is B
No explanation has been provided for this answer.
112.0 dm3
67.2 dm3
56.0 dm3
44.8 dm3
Correct answer is B
C3H8 + 5O2 → 3CO2 + 4H2O
When the mixture is ignited CO2 is collected as product. From the equation 33 moles of CO2 is produced which equals 3 x 2.4 dm3 = 67.2 dm3 at S.T.P