The octet rule is not followed in

Octet rule in not followed in

Octet rule is not followed in the set (A) C Cl_(4) , N_(2)O_(4) and N_(2)O_(5) (B) BF_(3) , BeCl_(2) and NO_(2) (C) NaCl , MgCl_(2) and MgO (D) PCl_(3) , NH_(3) and H_(2)O

The octet rule is not obeyed in :

The octet rule is not obeyed in :

The octet rule is not valid for

What is octet rule? Is it followed by all molecules? What type of exceptions have been observed to this rule? Illustrate your answer with examples.

The number of molecules which do not satisfy the octet rule among the following are PCl_(5),CO_(2),O_(3),AlCl_(3),BeCl_(2),ClF_(3),CH_(4)" and "NF_(3)