Q.

Which of the following statement is correct ?

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Lewis dot structures provide a picture of bonding in molecules and ions in terms of shared pair of electrons and octet rule

Lowest energy structure is the one with highest formal charges on the atoms

Octet rule is not applied in odd-electron molecules, molecules with expanded octet and incomplete octet of the central atom

Energy required to completely separate one mole of a solid ionic compound into gaseous constituent ions is called lattice enthalpy

answer is B.

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Detailed Solution

Statement (2) is incorrect. It’s correct form is as follows: The lowest energy structure is the one with the smallest formal charges on the atoms. The formal charge is a factor based on pure covalent view of bonding in which electron pairs are shared equally by neighboring atoms. Rest other statements are correct.

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