Identify a species which is 'NOT' a Bronsted acid but a Lewis acid.
Answer»
`BF_(3)` `H_(3)^(+)O` `NH_(3)` HCl
Solution :MOLECULES having a CENTRALATOM with incomplete octet, act as a Lewis acid not Bronsted acid (proton donor). In `BF_(3)`, B is having 6 ELECTRONS.