Which one (s) is/are true ?

Options

A. `(I)` and `(III)` are modest Bronsted bases whereas `(II)` is not.
B. In `(III) N^a` is more basic than `N^b`.
C. When `(II)` is protonated in the presence of a strong acid, protonation occurs at `C - 2`.
D. All the nitrogen present in `(I), (II)`, and `(III)` is `sp^2` hybridised.

Answer

A, C, D

Explanation

(a,c,d) (I)
But `(II)` is not protonated, hence the statement `(a)` is true.

So, `N^b` is more basic due to the presence of `L P overline e^, s`.
Hence, the statement `(b)` is wrong.

Statemenet `(c)` is true.
Statement `(d)` : Due to resonance all the `N` in `I, II` and `III` is `sp^2` hybridised and hence the statement is true.