Class 10 Chapter 4 Carbon and its Compounds / Class 10 Chemistry / By Neeti Rathore Introduction All living and non-living things are based on carbon. For example, food, medicines, books, clothes and many others. Carbon is an element of immense importance both in its combined form as well as in elemental form. Earth’s crust contains 0.02% of carbon in the form of carbonates, coal petroleum and the atmosphere contain only 0.03% carbon. CLASS 10 CHAPTER 4- Carbon and its Compound