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Which of the following is drawback of the octet theory?I. It is clear that octet rule is based upon the chemical inertness of noble gases. However, Some noble gases (for example xenon and krypton) also combine with oxygen and fluorine to form a number of compounds like XeF2,KrF2,XeOF2 etc. II. This theory does not account for the shape of molecules.III. It does not explain the relative stability of the molecules being totally silent about energy of a molecule.Choose the correct option.

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a

Only I

b

only II

c

Only III

d

All of the above

answer is D.

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Detailed Solution

Drawbacks of octet rule(i) Elements like Xe, Kr has complete octet, it undergoes chemical combination with highly electronegative O and F both.(i) This theory never say anything about structure of molecule.(iii) This theory does not deal about energy of various possible structures.
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Which of the following is drawback of the octet theory?I. It is clear that octet rule is based upon the chemical inertness of noble gases. However, Some noble gases (for example xenon and krypton) also combine with oxygen and fluorine to form a number of compounds like XeF2,KrF2,XeOF2 etc. II. This theory does not account for the shape of molecules.III. It does not explain the relative stability of the molecules being totally silent about energy of a molecule.Choose the correct option.