Which one of the following properties is not shown by NO ?

Which one of the following properties is not shown by NO ?
  1. It is diamagnetic in gaseous state
  2. It is a neutral oxide
  3. It combines with oxygen to form nitrogen dioxide
  4. It's bond order is 2.5

Solution

As per MOT, electronic configuration of NO is

σ1 s 2 < σ * 1 s 2 <σ2 s 2 < σ * 2 s 2 <σ2 p z 2 <π2 p x 2 =π2 p y 2 < π * 2 p x 1 = π * 2 p y 0

It is paramagnetic due to π 2 * py 1 (unpaired electron) 

Bond order of NO (i.e. O 2 + )= 105 2 =2.5

Asked in: JEE Main 2014 (06 Apr)

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