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- 1. Multiple Choice
Which statement is false? A sigma molecular orbital
may result from overlap of p atomic orbitals perpendicular to the molecular axis (side-on)
may result from overlap of p atomic orbitals along the molecular axis (head-on)
may result from overlap of two s atomic orbitals
may result from overlap of one s and one p atomic orbitals
- 2. Multiple Choice
Carbon monoxide has ten bonding electrons and four antibonding electrons. Therefore it has a bond order of
7
3
1
2
- 3. Multiple Choice
Which statement regarding stable heteronuclear diatomic molecules is false?
The antibonding molecular orbitals have more of the character of the more electropositive element than of the more electronegative element
Their molecular orbital diagrams are more symmetrical than those of homonuclear diatomic molecules
The bonding molecular orbitals have more of the character of the more electronegative element than of the less electronegative element.
All have bond orders greater than zero.
- 4. Multiple Choice
According to Molecular Orbital Theory, the shape and size of a molecular orbital depends upon _________
Shape and size of the combining atomic orbitals
Numbers of the combining atomic orbitals
Orientation of the combining atomic orbitals
All of the mentioned
- 5. Multiple Choice
Choose the incorrect statement from the following options.
In bonding molecular orbital, electron density is low in the region between the nuclei of bonded atoms
The energy of antibonding molecular orbital is higher than that of atomic orbitals from which it is formed
Every electron in bonding molecular orbital contributes toward stability of the molecule
Antibonding takes place when lobes of atomic orbitals have different signs
- 6. Multiple Choice
The filling of molecular orbital takes place according to __________
The Aufbau Principle
Pauli Exclusion Principle
Hund’s rule of maximum multiplicity
All of the mentioned
- 7. Multiple Choice
Antibonding molecular orbitals are produced by
constructive interaction of atomic orbitals.
destructive interaction of atomic orbitals.
the overlap of the atomic orbitals of two negative ions
none of these
- 8. Multiple Choice
Find the molecule having the highest bond order
O2+
O2–
O22-
O2
- 9. Multiple Choice
If the sign of the wave function is unchanged when the orbital is reflected about its centre, the orbital is ______________
Gerade as well as Ungerade
Gerade
Ungerade
None of the mentioned
- 10. Multiple Choice
In [ Co(NH3)6]3+ complex forms
low spin complex and diamagnetic
low spin complex and paramagnetic
high spin complex and diamagnetic
high spin complex and paramagnetic
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