Explain why the dipole moment of chlorobenzene is lower than that of cyclohexyl chloride?

Write the structure of the major organic product in each of the following reaction:

Write the structure of the major organic product in each of the following reaction:

Write the structure of the major organic product in each of the following reaction:

Write the structure of the major organic product in the following reaction:
${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{ONa}+{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{Cl}\to$