Difference In Properties of Ionic and Covalent Compounds

This table displays the major differences between ionic compounds and covalent compounds. 
Note also that the solid state, high melting and boiling point in ionic compounds is due to the strong electrostatic force of attraction, while the gaseous state, low melting and boiling point in covalent compounds is due to weak VanderWaal's force of attraction.


Frequently Tested Topics:

  • Properties of Ionic and Covalent Compounds

  • Definition of Coordinate Bond

  • Compounds Containing All Three Types of Bonds

  • Electron Dot Structures

*Note that other aspects of the chapter are equally important.

Important Past Questions:

  • Give the term for a bond formed by a shared pair of electrons with both electrons coming from the same atom. (2008, 2013)

  • Among the four given compounds, identify the one which is composed of all three kinds of bond [Ionic, Covalent, Coordinate] (2009, 2013)

Example:  A] Sodium Chloride  B] Ammonia  C] Carbon tetrachloride  D] Ammonium Chloride

  • Give one word for: formation of ions from molecules. (2014, 2018)

  • Give reason: Carbon tetrachloride is a non-electrolyte/does not conduct electricity. (2008, 2015)

  • State which is NOT a characteristic of an ionic compound. (2008, 2013)

Example:  A] High m.p  B] Conducts electricity when molten  C] Are insoluble in water  D] Exist as oppositely charged ions even in the solid state.

  • Electrovalent compounds have a __________ [low/high] boiling point. (2011, 2016)

  • Name the type of bonding present in the compound. (2009, 2010, 2012, 2014, 2015, 2016, 2017)

Example: State the type of bonding in the following molecules - i] Water  ii] Calcium Oxide

  • Draw the electron dot structure of the compound. (2009, 2011, 2012, 2015, 2016, 2017, 2018, 2019)

Example: Carbon tetrachloride, Ammonium ion, Hydronium ion, Methane, Magnesium Chloride, Nitrogen molecule, Sodium Chloride