Why do organic carbon compounds have lower melting points than ionic compounds ?

The correct answer is Option 4.

Key Points

• Since the attractive forces between molecules are weak, it doesn't take much energy to disrupt them and thus organic molecules have low melting and boiling points. Ionic compounds, in general, do not burn in oxygen.
  • An organic compound is any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen. 
  • Life is based on carbon; organic chemistry studies compounds in which carbon is a central element.
  • The properties of carbon make it the backbone of the organic molecules which form living matter.
  • Carbon is such a versatile element because it can form four covalent bonds.
  • Carbon skeletons can vary in length, branching, and ring structure.
  • The functional groups of organic molecules are the parts involved in chemical reactions.
  • Organic molecules important for life include relatively small monomers as well as large polymers.​

Additional Information

•  Ionic Bond:
  • The ionic bond is the electrostatic force of attraction that holds two oppositely charged ions together.
  • The complete transfer of one or more electrons from one atom to the other forms a chemical link between two atoms, causing the atoms to acquire their closest inert gas configuration.
  • Examples - KCl, AlCl3, NaCl