MOT

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

Carbon monoxide has ten bonding electrons and four antibonding electrons. Therefore it has a bond order of

• 7

• 3

• 1

• 2

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.

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

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

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

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

Find the molecule having the highest bond order

• O2+

• O2–

• O22-

• O2

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

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