Chemistry Past Questions | JAMB, WAEC, NECO 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.
Study the following Chemistry past questions and answers for JAMB, WAEC, NECO and Post UTME. Prepare yourself with official past questions and answers for your upcoming examinations.
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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
Related Lesson: Activation Energy Continued | Energy and Chemical Reactions
Comments (11)Question 2
The bond formed between \(\text{H}_2\text{O}\) and \(\text{H}^+\) to form the hydroxonium \(\text{H}_3\text{O}^+\) is
Options
A) Dative
B) Covalent
C) Electrovalent
D) Ionic
Related Lesson: Energy and Bonding Continued | Bonding and Atomic Combinations
Comments (3)Question 3
An element \(\text{X}\) forms the following oxides \(\text{X}_2\text{O}, \text{XO}\) and \(\text{XO}_2.\) This phenomenon illustrates the law of ________.
Options
A) Conservation of mass
B) Definite proportion
C) Mass action
D) Multiple proportion
Related Lesson: Dalton’s Atomic Theory Continued | Atoms, Molecules and Ions
Comments (3)Question 4
How many moles of oxygen would contain \(1.204 \times 10^{24}\) molecules?
NB: Avogadro's constant (NA) \(= 6.02 \times 10^{23}\)
Options
A) 1
B) 2
C) 3
D) 4
Related Lesson: Compounds | Quantitative Aspects of Chemical Change
Comments (3)Question 5
Which of the following statements about solids is correct?
Options
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
Related Lesson: Summarizing the Solid State of Matter | Liquids and Solids
Comments (4)Question 6
Which of the following apparatus can be used to measure a specific volume of a liquid accurately?
Options
A) Beaker
B) Conical flask
C) Measuring cyclinder
D) Pipette
Related Lesson: Laboratory Apparatus | Essential Ideas in Chemistry
Comments (3)Question 7
The general gas equation \(\frac{\text{PV}}{\text{T}} = \text{K}\) is a combination of
Options
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
Related Lesson: Volume and Temperature: Charles’s Law | Gases
Comments (3)Question 8
The spreading of the scent of a flower in a garden is an example of ________.
Options
A) Brownian motion
B) Diffusion
C) Osmosis
D) Tynadal effect
Related Lesson: Summarizing Effusion and Diffusion of Gases | Gases
Comments (2)Question 9
Propane and carbon (IV) oxide diffuse at the same rate because [H = 1.00, C = 12.0, O = 16.0]
Options
A) They are both gases
B) Their molecules contain carbon
C) They have the same relative molecular mass
D) Both are denser than air
Related Lesson: Molar Mass | Quantitative Aspects of Chemical Change
Comments (5)Question 10
The energy which accompanies the addition of an electron to an isolated gaseous atom is
Options
A) Atomization
B) Electronegativity
C) Electron affinity
D) Ionization
Related Lesson: Glossary of Words | Electronic Structure of Atoms
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