Q. 235.0( 1 Vote )

In the following questions two or more options may be correct.

Which of the following have identical bond order?

A. CN-

B. NO+

C. O-2

D. O2-2

Answer :

The isoelectronic species have a similar bond order.

Both CN- and NO+ have 14 electrons.

Both CN- and NO+ have identical bond order i.e. 3.

(MOT diagram of CN-)

So, from the above diagram in CN-,

Electrons in bonding molecular orbitals = 8

Electrons in Anti Bonding Molecular orbitals = 2

Bond Order = .

= (8-2)

= 3

So, from the above MOT diagram of NO+,

Electrons in bonding molecular orbitals = 10(2e- in 1s)

Electrons in Anti Bonding Molecular orbitals = 4(2e- in 1*s)

Bond Order = .

= (10-4)

= 3.

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