Question

Which of following is a polar molecule 1) KCl 2) F - F (3) H-O-H (4) S8

Answer 1

Given: 1. KCl     2. F-F     3. H-O-H     4. S8

To find: Polar molecule              

Explanation:

Among given four molecules, KCl and H-O-H are polar.

1. KCl is polar molecule because it has ionic bond and there is difference in electronegativity between potassium and chlorine atom.

2. Fluorine molecule is non polar because  difference in electronegativity is zero.

3. Water molecule is polar because it has net dipole moment due to its structure.

4. S8 is non polar due to no difference in electronegativity among atoms.