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Kossel - Lewis approach to chemical bonding

Question

The number of hypervalent species among the following: ClO4,BF3,SO42,CO32 is

Moderate
Solution

Compounds or species in which the central atoms have more than an octet of electrons (i.e. 8 e's), such compounds with as expanded octet are called hypervalent compounds.

Thus species (i) CIO4 and (ii) SO42- are hypervalent species.



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Number of molecules that do not follow octet rule among the following is :

                        CO,PCl5,PCl3,AlCl3,SF6,BF3,NH3


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