AP EAPCET 04-Jul-2022 Shift 2 Paper

(b) Formal charge ( FC) can be calculated by using formula :
FC= (number of electrons in neutral atom) −‌

1

2

(number of electrons in covalent bonds) - (number of electrons in lone pairs)Formal charge on lst atom i.e., oxygen is
FC=6−‌

1

2

×4−4=6−2−4=0
Formal charge on 2nd atom i.e., nitrogen is
FC=5−‌

1

2

×8−0=5−4=+1
Formal charge on 3rd atom i.e., oxygen is
FC=6−‌

1

2

×4−4=6−2−4=0
Hence, formal charge of atoms 1,2 and 3 in the ion [O1=N2=O3+. is 0,+1 and 0 respectively.