Which one of the following conversions involv | vedclass

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(C) Let us analyze each conversion:$(a)$ $CH_{4}$ ($sp^{3}$,tetrahedral) $\longrightarrow C_{2}H_{6}$ ($sp^{3}$,tetrahedral). No change in hybridisati

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$BF_{3} \longrightarrow BF_{4}^{-}$

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(C) Let us analyze each conversion:$(a)$ $CH_{4}$ ($sp^{3}$,tetrahedral) $\longrightarrow C_{2}H_{6}$ ($sp^{3}$,tetrahedral). No change in hybridisation or shape.$(b)$ $NH_{3}$ ($sp^{3}$,trigonal pyramidal) $\longrightarrow NH_{4}^{+}$ ($sp^{3}$,tetrahedral). Change in shape,but no change in hybridisation.$(c)$ $BF_{3}$ ($sp^{2}$,trigonal planar) $\longrightarrow BF_{4}^{-}$ ($sp^{3}$,tetrahedral). Both hybridisation and shape change.$(d)$ $H_{2}O$ ($sp^{3}$,bent) $\longrightarrow H_{3}O^{+}$ ($sp^{3}$,trigonal pyramidal). Change in shape,but no change in hybridisation.Thus,the conversion of $BF_{3}$ into $BF_{4}^{-}$ involves a change in both hybridisation and shape.

Which one of the following conversions involves a change in both hybridisation and shape?

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