Thursday, 1 August 2013

Some Basic Concepts of Chemistry - Chapter Summary

Chemistry deals with the composition, structure and properties of matter.
Anything that has mass and occupies space is called matter.
Matter mainly exists in three forms - solid, liquid and gaseous forms. These forms are inter convertible by changing the temperature and pressure.


SOLID <----> LIQUID <----> GAS
  • Solids have a definite volume and definite shape. The particles are closely attached and there is not much freedom of movement.
  • Liquids does not have a definite shape but have a definite volume. The particles are not so close and there is a freedom of movement.
  • Gases neither have definite shape nor have a definite volume. The particles are situated as far as they can and are able to move freely. 

The Last Lesson by Alphonse Daudet - Chapter Summary

  The narrator (Franz) started for school very late that morning. He feared his class teacher, would question him on participles. The narr...