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Question

Arrange NO+2,NO2 and NO3 in the decreasing order of their NO bond lengths.

A
NO3>NO+2>NO2
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B
NO3>NO2>NO+2
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C
NO+2>NO3>NO2
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D
NO2>NO3>NO+2
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Solution

The correct option is B NO3>NO2>NO+2
N atom in NO+2 is sp hybridised whereas in NO2 and NO3, it is sp2 hybridised.

Bond order = No.of bond between two atoms in all possible structuresNo. of resonating structures

Bond order of NO+2 = 2

Bond order of NO2 :

B.O = 2+12=1.5

Bond order of NO3 :


B.O = 2+1+13=1.33

Since Bond length 1Bond order

So order of bond length is NO3>NO2>NO+2

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