In which of the following conversions there are changes of hybridisati

1.	In which of the following conversions there are changes of hybridisation and shape-
Answer» `CH_(4) to C_(2)H_(6)` `NH_(3) to NH_(4)^(o+)` `BF_(3) to BF_(4)^(Theta)` `H_(2)O to H_(3)O^(o+)` Solution :`BF_(3)` molecule exhibits trigonal planar geometry with each F-B-F bond ANGLE `120^(@)`. B ATOM is `sp^(2)` hybridised. `BF_(4)^(-)` on the other hand exhibits tetrahedral geometry with each F-B-F bond angle `109.5^(@)`. B-atom is `sp^(3)`-hybridised.

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