Predict the direction and the relative value of the dipole moment of the following bond:
(a) c←cl, electronegativity difference > 0.5
(b) c←cl, electronegativity difference < 0.5
(c) c→cl, electronegativity difference > 0.5
(d) c→cl, electronegativity difference < 0.5

The direction of dipole moment is C→Cl and electronegativity difference = 0.5

Explanation:

The dipole moment is formed when there is a separation of charges in a chemical bond. The electrons of the bond tend to be more localized near the more electronegative atom.  

The electronegativity of chlorine atom = 3.0 and electronegativity of carbon atom = 2.5

Therefore, chlorine is more electronegative than carbon. So, the electrons tend to be localized more near the electronegative chlorine atom. Therefore, the direction of dipole moment is C→Cl and electronegativity difference is equal to 0.5.