Electronegativity of beryllium $(Be)$ is approximately equal to that of

Which is the correct order of electronegativities?

The element with the highest electronegativity value after fluorine $(F)$ is:

Among $Me_{3}N$, $C_{5}H_{5}N$ and $MeCN$ $(Me = \text{methyl group})$, the electronegativity of $N$ is in the order:

Aqueous solutions of two compounds $M_1OH$ and $M_2OH$ are prepared in two different beakers. If the $EN$ of $M_1 = 3.4$,$EN$ of $M_2 = 1.2$,$EN$ of $O = 3.5$,and $EN$ of $H = 2.1$,then the nature of the two solutions will be:

The electronegativity of aluminium is similar to