24. BF3 does not have proton but still acts as an acid and reacts with N..H3. Why is it so? What type of bond is formed between the two?


BF3 is an electron deficient compound and hence acts as Lewis acid. N..H3 has one lone pair which it can donate to BF3 and form a coordinate bond. Hence, NH3 acts as a Lewis base.
H3N:BF3