The electronegativity of $C$,$H$,$O$,$N$ and $S$ are $2.5$,$2.1$,$3.5$,$3.0$ and $2.5$ respectively. Which of the following bonds is most polar?

In which of the following pairs of elements is the electronegativity of the first element less than that of the second element?

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 correct order of electronegativity of group $13$ elements is

Arrange the following elements in increasing order of electronegativity:
$N, O, F, C, Si$
Choose the correct answer from the options given below:

Arrange the following elements in the decreasing order of their electronegativity values.