Chemistry WAEC GCE 2021/2022 and Post UTME Past Questions
Chemistry explores the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances. This subject is popular among science students.
Question 1
The minimum amount of energy required for effective collisions between reacting particles is known as
Options
A) Activation energy
B) Bond energy
C) Kinetic energy
D) Potential energy
Question 2
The bond formed between H2O
and H+ to form the hydroxonium H3O+
is
A) Dative
B) Covalent
C) Electrovalent
D) Ionic
Question 3
An element X
forms the following oxides X2O,XO and XO2.
This phenomenon illustrates the law of ________.
Options
A) Conservation of mass
B) Definite proportion
C) Mass action
D) Multiple proportion
Question 4
How many moles of oxygen would contain 1.204×1024
molecules?
NB: Avogadro's constant (NA) =6.02×1023
A) 1
B) 2
C) 3
D) 4
Question 5
Which of the following statements about solids is correct?
A) Solid particles are less orderly than those of a liquid
B) Solid have lower densities than liquids
C) Solid particles have greater kinetic energies than those of liquids
D) Solid particles cannot be easily compressed
Question 6
Which of the following apparatus can be used to measure a specific volume of a liquid accurately?
A) Beaker
B) Conical flask
C) Measuring cyclinder
D) Pipette
Question 7
The general gas equation PVT=K
is a combination of
A) Boyle's and Charles' laws
B) Boyle's and Graham's laws
C) Charles' and Graham's laws
D) Dalton's and Graham's laws
Question 8
The spreading of the scent of a flower in a garden is an example of ________.
A) Brownian motion
B) Diffusion
C) Osmosis
D) Tynadal effect
Question 9
Propane and carbon (IV) oxide diffuse at the same rate because [H = 1.00, C = 12.0, O = 16.0]
A) They are both gases
B) Their molecules contain carbon
C) They have the same relative molecular mass
D) Both are denser than air
Question 10
The energy which accompanies the addition of an electron to an isolated gaseous atom is
A) Atomization
B) Electronegativity
C) Electron affinity
D) Ionization