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AP EAMCET20224 Jul 2022Evening ShiftChemistryChemical Bonding and Molecular StructureActual

The set of molecules in which the central atom is not obeying the octet rule is

Options

  1. ACO 2 , SiH 4 , BeCl 2
  2. BH 2 O , Cl 2 O , CO 2
  3. CCH 4 , NH 3 , OF 2
  4. DSF 6 , PCl 5 , XeF 2

Correct answer

D. SF 6 , PCl 5 , XeF 2

Step-by-step solution

The octet rule was given by Lewis. It states that elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas. Among the given options SF 6 ( 12   e ) ,   PCl 5 ( 10 e ) ,   XeF 2 ( 10   e ) does not follow octet rule. As we can see that in none of them, the central atom has 8 electrons in its valence shell. They are also called expended octet.

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