A) \[~PC{{l}_{5}}\]
B) \[CC{{I}_{4}}\]
C) \[PC{{l}_{3}}\]
D) \[POC{{l}_{3}}\]
Correct Answer: A
Solution :
\[{{\operatorname{PCl}}_{5}}\]exist as \[{{\left[ PC{{l}_{4}} \right]}^{+}}{{\left[ PC{{l}_{6}} \right]}^{-}}\] in the solid state and as \[{{\operatorname{PCl}}_{5}}\] molecules is the gas phase. \[{{\operatorname{PCl}}_{5}}\]is pentahalide, i.e. they have trigonal bipyramid geometry, central atom is \[s{{p}^{3}}\] hybridised. \[{{\operatorname{PCl}}_{5}}\] is covalent in vapour state but exists as \[\left[ PC{{l}_{4}}^{+} \right]{{\left[ PC{{l}_{6}} \right]}^{-}}\] in crystalline state, the ions have tetrahedral and. octahedral structures respectively.
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