Which of the following statements is not true regarding molecular orbital theory?

The atomic orbitals of comparable energies combine to form molecular orbitals

An atomic orbital is monocentric while a molecular orbital is polycentric

Bonding molecular orbital has higher energy than antibonding molecular orbital

Molecular orbitals like atomic orbitals obey Aufbau principle for filling of electrons

The conditions for the combination of atomic orbitals to form molecular orbitals are stated below. Mark the incorrect condition mentioned here.

The combining atomic orbitals must have nearly same energy

The combining atomic orbitals must overlap to maximum extent

Combining atomic orbitals must have same symmetry about the molecular axis

Pi (π) molecular orbitals are symmetrical around the bond axis

The electronic configuration of carbon is Is 2 2s 2 2p 2 . There are 12 electrons in C 2 . The correct electronic configuration of C 2 molecule is

(σls 2 ) (σ*1s 2 ) (σ2s 2 ) (σ*2s 2 ) (σ2p 2 z ) (π2p 2 x )

(σls 2 )(σ*1s 2 ) (σ2s 2 ) (σ*2s 2 ) (π2p 2 x = π2p 2 y )

(σls 2 ) (σ*1s 2 ) (σ2s 2 ) (σ*2s 2 )(σ2p 2 z )(π2p 1 x = π2p 1 y )

(σls 2 ) (σ*1s 2 ) (σ2s 2 )(σ*2s 2 ) (π2p 1 x = π2p 1 y )

What is the order of stability of N 2 and its ions?

N 2 > N + 2 = N − 2 > N 2− 2

N + 2 > N − 2 > N 2 > N 2− 2

N − 2 > N + 2 > N 2 > N 2− 2

N 2− 2 > N − 2 = N + 2 > N 2

Which of the following facts regarding bond order is not valid?

Bond order is given by the number of bonds between the two atoms in a molecule

With increase in bond order, bond enthalpy of the molecule decreases

Isoelectronic molecules and ions have identical bond orders

With increase in bond order, bond length decreases

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