Chemical Bonding Practice Questions
NECO (Nigeria) · NECO Chemistry · 136 free MCQs with instant results and detailed explanations.
136
Total
37
Easy
66
Medium
33
Hard
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Sample Questions from Chemical Bonding
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Q1
Easy
Which of the following elements is likely to form an ionic bond with Sodium (Na)?
A.
Chlorine (Cl)
B.
Oxygen (O)
C.
Nitrogen (N)
D.
Argon (Ar)
Show Answer & Explanation
Correct Answer: A
Chlorine (Cl) is a halogen that readily gains an electron to achieve a stable electron configuration, forming an ionic bond with sodium, which donates one electron.
Q2
Easy
In which of the following compounds does a metallic bond primarily occur?
A.
NaCl
B.
MgO
C.
Cu
D.
H2O
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Correct Answer: C
Copper (Cu) is a metal, and metallic bonds occur between metal atoms where electrons are shared in a 'sea of electrons', allowing conductivity and malleability.
Q3
Easy
What type of bond is formed when two atoms share electrons equally?
A.
Ionic bond
B.
Covalent bond
C.
Metallic bond
D.
Hydrogen bond
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Correct Answer: B
A covalent bond involves the sharing of electrons between two atoms. When the sharing is equal, it is specifically a nonpolar covalent bond.
Q4
Medium
Which of the following correctly describes a characteristic of metallic bonds?
A.
High melting points
B.
Low electrical conductivity
C.
Fixed position of electrons
D.
Directional nature
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Correct Answer: A
Metallic bonds are characterized by a 'sea of electrons' which allows for high melting points and good electrical conductivity due to mobile electrons.
Q5
Medium
Which of the following compounds has an ionic bond?
A.
NH3
B.
NaCl
C.
Cl2
D.
CH4
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Correct Answer: B
NaCl is an ionic compound formed from the transfer of electrons from sodium to chlorine, resulting in the formation of Na+ and Cl- ions.
Q6
Medium
What type of bond is formed between two nonmetals that share electrons equally?
A.
Ionic bond
B.
Covalent bond
C.
Metallic bond
D.
Hydrogen bond
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Correct Answer: B
A covalent bond involves the sharing of electrons between two nonmetals, leading to an equal distribution of electron density.
Q7
Medium
In a water molecule (H2O), what type of bonding is primarily responsible for the molecular structure?
A.
Ionic bonding
B.
Covalent bonding
C.
Metallic bonding
D.
Van der Waals forces
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Correct Answer: B
Water molecules are formed through covalent bonding, where oxygen shares electrons with hydrogen atoms to achieve stability.
Q8
Hard
Which of the following statements best describes the nature of a covalent bond?
A.
It involves the transfer of electrons from one atom to another.
B.
It is the force of attraction between oppositely charged ions.
C.
It is formed by the sharing of electron pairs between atoms.
D.
It results from the overlap of atomic orbitals that have similar energies.
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Correct Answer: C
A covalent bond is characterized by the sharing of electron pairs between atoms, allowing each atom to attain the electron configuration of a noble gas. This is distinct from ionic bonds, which involve transfer of electrons.
Q9
Hard
In a certain molecule, the bond angle is measured to be 120 degrees. Which type of molecular geometry is most likely present?
A.
Tetrahedral
B.
Trigonal planar
C.
Linear
D.
Bent
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Correct Answer: B
A bond angle of 120 degrees is characteristic of a trigonal planar molecular geometry, where three atoms are arranged around a central atom at 120-degree angles, maximizing their distance from each other.
Q10
Hard
Which of the following statements best describes the bond energy of a covalent bond?
A.
Bond energy is the energy required to break one mole of a bond in a gaseous state.
B.
Bond energy increases with the length of the bond between atoms.
C.
Bond energy is constant regardless of the molecular environment.
D.
Bond energy is always less than the sum of the individual atomic energies.
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Correct Answer: A
Bond energy is defined as the amount of energy required to break one mole of a specific covalent bond in the gas phase, indicating the strength of the bond.
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Chemical Bonding — NECO (Nigeria) NECO Chemistry Practice Questions Online
This page contains 136 practice MCQs for the chapter Chemical Bonding in NECO (Nigeria) NECO Chemistry. The questions are organized by difficulty — 37 easy, 66 medium, 33 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.