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Solution


Q.

The formal charges on the atoms marked as (1) to (4) in the Lewis representation of HNO3 molecule respectively are        [2026]
1 +1, 0, 0, −1  
2 0, 0, −1, +1  
3 0, +1, 0, −1  
4 0, −1, 0, +1  

Ans.

(3)

Consider the structure of HNO3

1 : 0 
2 : (+1) 
3 : 0 
4 : (-1)

Formal charge=valence e's-non bonding e's-(bonding electrons2)