Chemistry - CHEMICAL BONDING Question with Solution | TestHub

Analyze CO₃²

Central atom = C

Valence electrons of C = 4

Three O atoms bonded → 3 sigma bonds

Total bond pairs around C = 3

Lone pairs on central C = 0

Ratio (lone pair : bond pair) = 0 : 3

(A) CN⁻

Central atom = C

Bonded to N via triple bond → 3 bond pairs

Lone pair on C = 1

Ratio = 1 : 3 Not same as CO₃²⁻

(B) COCl₂ (Phosgene)

Central atom = C

Bonds: 1 C=O + 2 C–Cl → 3 bond pairs

Lone pairs on C = 0

Ratio = 0 : 3 Same

(C) POCl₃

Central atom = P

Bonds: 3 P–Cl + 1 P=O → 4 bond pairs

Lone pairs on P = 0

Ratio = 0 : 4 Not same

(D) NO₂Cl (Nitrosyl chloride)

Central atom = N

Bonds: N–O + N=O + N–Cl → 3 bond pairs

Lone pairs on N = 0

Ratio = 0 : 3 Same