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Q.

VSEPR theory does not state :

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a

the order of repulsion between different pair of electrons is lp-lp>lp-bp>bp-bp (lp = lone pair electrons, bp = bond pair electrons)

b

the number of lone pairs on O in  H2O is 1 while on N in NH3 is 2.

c

as the number of lone pair of electrons on central atom increases, the deviation in BA form normal BA (Bond-Angle) also increases

d

the structures of xenon-fluorides and xenon oxyfluorides could be explained on the basis of VSEPR theory.

answer is C.

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Detailed Solution

Although the VSEPR model is useful in predicting molecular geometry, it fails to predict the shapes of isoelectronic species and transition metal compounds. This model does not take relative sizes of substituents and stereo chemically inactive lone pairs into account.

Hence, the correct option is C. 

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