Question

The correct order of decreasing basic strengths of $x,y$ and $z$ is:

• A. $x>y>z$
• B. $x>z>y$
• C. $y>x>z$
• D. $y>z>x$

Answer 1

The correct option is B $x>z>y$

In (y) , the lone pair on nitrogen is delocalized, making it less available for donation. This is not the case in (x) and (z). So, (y) is the least basic.


Between (x) and (z) :
Nitrogen in (z) is $s{p}^2$ hybridised, whereas in (x) it is $s{p}^3$ hybridised.
more the s character, more is the electronegativity, and less is the basic character.
So, the correct option is (b)