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

Options

A. `CH_(4)to C_(2)H_(6)`
B. `NH_(3)to NH_(4)^(+)`
C. `BF_(3)to BF_(4)^(-)`
D. `H_(2)O to H_()O^(+)`

Answer

C

Explanation

In `BF_(3)`, the hybridisation of B is `sp^(2)` and its geometry is trigonal planar. In `BF_(4)^(-)`, the hybridisation of B is `sp^(3)` and its geometry is tetrahedral.