Elementary Idea of Metallic Bonding NEET Questions

Physical Chemistry - Chemical Bonding and Molecular Structure

Elementary Idea of Metallic Bonding MCQ Questions


1.
Which of the following best describes metallic bonding?
A.
Electrostatic attraction between positive metal ions (kernels) and a sea of delocalised valence electrons
B.
Weak van der Waals forces of attraction between neutral metal atoms
C.
Complete transfer of electrons from one metal atom to another forming ions
D.
Sharing of electron pairs between two metal atoms forming directional covalent bonds
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ANSWER :
A. Electrostatic attraction between positive metal ions (kernels) and a sea of delocalised valence electrons
2.
The model used to explain metallic bonding in which valence electrons move freely throughout the metal lattice is called:
A.
Electron sea model
B.
Valence bond model
C.
Molecular orbital model
D.
Crystal field model
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ANSWER :
A. Electron sea model
3.
The high electrical conductivity of metals is primarily due to:
A.
Strong directional covalent bonds between metal atoms
B.
Presence of mobile positive metal ions in the lattice
C.
Presence of free, delocalised valence electrons that can drift under an applied electric field
D.
Transfer of protons between adjacent metal atoms
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ANSWER :
C. Presence of free, delocalised valence electrons that can drift under an applied electric field
4.
Which property of metals is NOT explained by the electron sea model?
A.
Malleability and ductility
B.
Variation in melting points among different metals (e.g., Hg vs W)
C.
Metallic lustre
D.
High electrical conductivity
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ANSWER :
B. Variation in melting points among different metals (e.g., Hg vs W)
5.
Metals are malleable and ductile because:
A.
Covalent bonds between metal atoms are highly directional and flexible
B.
The non-directional metallic bonds allow layers of metal kernels to slide over one another without breaking the bonding
C.
Metal atoms are held by weak van der Waals forces that easily yield to stress
D.
Metals contain ionic bonds that re-form rapidly after deformation
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ANSWER :
B. The non-directional metallic bonds allow layers of metal kernels to slide over one another without breaking the bonding
6.
Which of the following statements about metallic bonding is INCORRECT?
A.
Metallic bonding is generally stronger than van der Waals forces
B.
Metallic bonds are highly directional in nature
C.
Metallic bonds are non-directional
D.
Metallic bonds involve delocalised valence electrons
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ANSWER :
B. Metallic bonds are highly directional in nature