Q. Which of the following species has sp2 hybridization?
-
A.
C2H2
-
B.
BF3
-
C.
C2H4
-
D.
CH4
Solution
C2H4 (ethylene) has a carbon-carbon double bond, and each carbon is sp2 hybridized.
Correct Answer: C — C2H4
Learn More →
Q. Which of the following species has the highest bond order?
-
A.
O2+
-
B.
O2
-
C.
O2-
-
D.
O2 2-
Solution
O2+ has a bond order of 2.5, which is higher than O2 (2), O2- (1.5), and O2 2- (1).
Correct Answer: A — O2+
Learn More →
Q. Which of the following statements about metallic bonding is true?
-
A.
Electrons are localized
-
B.
Electrons are delocalized
-
C.
Only positive ions are present
-
D.
It involves sharing of electrons
Solution
In metallic bonding, electrons are delocalized, allowing for conductivity and malleability.
Correct Answer: B — Electrons are delocalized
Learn More →
Q. Which of the following statements about molecular orbitals is correct?
-
A.
Molecular orbitals are formed by the overlap of atomic orbitals.
-
B.
Molecular orbitals can only be occupied by one electron.
-
C.
Bonding molecular orbitals have higher energy than antibonding orbitals.
-
D.
Molecular orbitals do not influence the shape of molecules.
Solution
Molecular orbitals are indeed formed by the overlap of atomic orbitals.
Correct Answer: A — Molecular orbitals are formed by the overlap of atomic orbitals.
Learn More →
Q. Which of the following statements about molecular orbitals is incorrect?
-
A.
Molecular orbitals can be occupied by a maximum of two electrons.
-
B.
Bonding orbitals are lower in energy than antibonding orbitals.
-
C.
Molecular orbitals are formed from the linear combination of atomic orbitals.
-
D.
All molecular orbitals are degenerate.
Solution
Not all molecular orbitals are degenerate; some can have different energy levels.
Correct Answer: D — All molecular orbitals are degenerate.
Learn More →
Q. Which of the following statements about molecular orbitals is true?
-
A.
Molecular orbitals are formed by the overlap of atomic orbitals.
-
B.
Molecular orbitals can only be occupied by one electron.
-
C.
Molecular orbitals do not have any energy levels.
-
D.
Molecular orbitals are only found in diatomic molecules.
Solution
Molecular orbitals are indeed formed by the overlap of atomic orbitals.
Correct Answer: A — Molecular orbitals are formed by the overlap of atomic orbitals.
Learn More →
Q. Which of the following statements is correct regarding the molecular orbital theory?
-
A.
It explains the magnetic properties of molecules.
-
B.
It does not apply to diatomic molecules.
-
C.
It only considers sigma bonds.
-
D.
It is not applicable to resonance structures.
Solution
Molecular orbital theory explains the magnetic properties of molecules, including paramagnetism and diamagnetism.
Correct Answer: A — It explains the magnetic properties of molecules.
Learn More →
Q. Which of the following statements is incorrect regarding molecular orbitals?
-
A.
Molecular orbitals can be occupied by a maximum of two electrons.
-
B.
Bonding molecular orbitals are lower in energy than the corresponding atomic orbitals.
-
C.
Antibonding molecular orbitals are higher in energy than the corresponding atomic orbitals.
-
D.
All molecular orbitals are degenerate.
Solution
Not all molecular orbitals are degenerate; some can have different energy levels.
Correct Answer: D — All molecular orbitals are degenerate.
Learn More →
Q. Which of the following statements is true about ionic compounds?
-
A.
They have low melting points
-
B.
They conduct electricity in solid state
-
C.
They are soluble in water
-
D.
They are volatile
Solution
Ionic compounds are generally soluble in water due to the polar nature of water molecules.
Correct Answer: C — They are soluble in water
Learn More →
Q. Which of the following statements is true about the molecular orbital theory?
-
A.
It only applies to diatomic molecules
-
B.
It explains the magnetic properties of molecules
-
C.
It does not consider electron spin
-
D.
It is less accurate than valence bond theory
Solution
Molecular orbital theory explains the magnetic properties of molecules, particularly the presence of unpaired electrons.
Correct Answer: B — It explains the magnetic properties of molecules
Learn More →
Q. Which of the following statements is true according to molecular orbital theory?
-
A.
Bonding orbitals are higher in energy than antibonding orbitals.
-
B.
Bonding orbitals are lower in energy than antibonding orbitals.
-
C.
All molecular orbitals are degenerate.
-
D.
Molecular orbitals do not influence bond length.
Solution
Bonding orbitals are lower in energy than antibonding orbitals, which is a fundamental principle of molecular orbital theory.
Correct Answer: B — Bonding orbitals are lower in energy than antibonding orbitals.
Learn More →
Q. Which of the following statements is true regarding the energy levels of molecular orbitals?
-
A.
σ orbitals are always lower in energy than π orbitals.
-
B.
π orbitals are always lower in energy than σ orbitals.
-
C.
For second period elements, σ2p is lower than π2p.
-
D.
Bonding orbitals are higher in energy than antibonding orbitals.
Solution
For second period elements, σ2p is lower in energy than π2p.
Correct Answer: C — For second period elements, σ2p is lower than π2p.
Learn More →
Q. Which of the following statements is true regarding the molecular orbital configuration of O2?
-
A.
It has 2 unpaired electrons
-
B.
It has 4 unpaired electrons
-
C.
It is diamagnetic
-
D.
It has a bond order of 3
Solution
O2 has 2 unpaired electrons in its molecular orbital configuration, making it paramagnetic.
Correct Answer: A — It has 2 unpaired electrons
Learn More →
Q. Which of the following statements is true regarding the molecular orbital theory?
-
A.
It only applies to diatomic molecules.
-
B.
It explains the magnetic properties of molecules.
-
C.
It does not consider electron spin.
-
D.
It is less accurate than valence bond theory.
Solution
Molecular orbital theory explains the magnetic properties of molecules, such as paramagnetism in O2.
Correct Answer: B — It explains the magnetic properties of molecules.
Learn More →
Q. Which of the following types of bonds involves the sharing of electron pairs between atoms?
-
A.
Ionic bond
-
B.
Covalent bond
-
C.
Metallic bond
-
D.
Hydrogen bond
Solution
Covalent bonds are formed when two atoms share one or more pairs of electrons.
Correct Answer: B — Covalent bond
Learn More →
Showing 181 to 195 of 195 (7 Pages)
