Q. In which of the following molecules is the central atom sp3 hybridized?
-
A.
BeCl2
-
B.
SiCl4
-
C.
PCl5
-
D.
SF6
Solution
SiCl4 has four bonding pairs and no lone pairs, leading to sp3 hybridization of the silicon atom.
Correct Answer:
B
— SiCl4
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Q. In which type of bond does electron sharing occur?
-
A.
Ionic
-
B.
Covalent
-
C.
Metallic
-
D.
Hydrogen
Solution
Covalent bonds involve the sharing of electron pairs between atoms.
Correct Answer:
B
— Covalent
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Q. What is the hybridization of the central atom in SF4?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
sp3d
Solution
The central sulfur atom in SF4 has 4 bonding pairs and 1 lone pair, leading to sp3d hybridization.
Correct Answer:
D
— sp3d
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Q. What is the molecular geometry of CO2?
-
A.
Linear
-
B.
Bent
-
C.
Trigonal Planar
-
D.
Tetrahedral
Solution
CO2 has a linear geometry due to the arrangement of two double bonds around the central carbon atom.
Correct Answer:
A
— Linear
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Q. What is the molecular geometry of the sulfate ion (SO4^2-)?
-
A.
Linear
-
B.
Trigonal planar
-
C.
Tetrahedral
-
D.
Octahedral
Solution
The sulfate ion has four bonding pairs and no lone pairs, resulting in a tetrahedral molecular geometry.
Correct Answer:
C
— Tetrahedral
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Q. What is the primary type of bonding in metals?
-
A.
Ionic
-
B.
Covalent
-
C.
Metallic
-
D.
Hydrogen
Solution
Metallic bonding involves a 'sea of electrons' that are delocalized over a lattice of metal cations.
Correct Answer:
C
— Metallic
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Q. What is the shape of the NH4+ ion?
-
A.
Linear
-
B.
Trigonal Planar
-
C.
Tetrahedral
-
D.
Octahedral
Solution
The NH4+ ion has a tetrahedral shape due to four bonding pairs around the nitrogen atom.
Correct Answer:
C
— Tetrahedral
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Q. Which molecule exhibits resonance?
-
A.
H2O
-
B.
CO2
-
C.
O3
-
D.
CH4
Solution
Ozone (O3) exhibits resonance due to the delocalization of electrons between the three oxygen atoms.
Correct Answer:
C
— O3
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Q. Which of the following best describes the bond angle in a water molecule?
-
A.
180 degrees
-
B.
120 degrees
-
C.
109.5 degrees
-
D.
104.5 degrees
Solution
The bond angle in water is approximately 104.5 degrees due to the repulsion of the two lone pairs on the oxygen atom.
Correct Answer:
D
— 104.5 degrees
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Q. Which of the following molecules has a trigonal planar geometry?
-
A.
CH4
-
B.
BF3
-
C.
NH3
-
D.
H2O
Solution
BF3 has three bonding pairs and no lone pairs, resulting in a trigonal planar geometry.
Correct Answer:
B
— BF3
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Q. Which type of intermolecular force is the strongest?
-
A.
London Dispersion Forces
-
B.
Dipole-Dipole Interactions
-
C.
Hydrogen Bonds
-
D.
Ionic Bonds
Solution
Ionic bonds are the strongest type of intermolecular force due to the electrostatic attraction between charged ions.
Correct Answer:
D
— Ionic Bonds
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