Dipole-Dipole attractions

• Permeanant Dipole-dipole forces of attraction take place in polar molecules

  
• Polarity is the unequal distribution of electrons in between atoms, It is a property of covalent bonds
• A dipole moment sums up the effect of polarity in all the bonds in the molecule
• In molecules with more than 1 polar bond despite having different electronegativities, the effects may cancel due to the shape, leaving a non-polar molecule