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

The electronegativity values 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?

The electronegativity values of C, H, O and N are 2.5, 1.0, 3.0 and 3.5 respectively: Which of the following is the most polar bond?

The electronegativity of H, O and X are 2.1, 3.5 and 0.7 respectively. The correct nature of compound X-O-H is