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Which of the following species have undistorted octahedral structures?
(P) ${SF}_{6}$ (Q) ${PF}_{6}^{-}$ (R) ${SiF}_{6}^{2 -}$ (S) ${XeF}_{6}$
Select the correct answer using the codes given below:

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Q and R

P, R and S

R and S

P, Q and S

answer is C.

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Detailed Solution

XeF6 has a distorted octahedral structure due to the presence of one lone pair of electrons on the Xe atom. PF6− and SiF62− have undistorted octahedral structures.

P, Q, R have perfect octahedral shape. So, correct code is Q and R.

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