Electrochemistry

Solution

Solution : Homogeneous mixture of two or more than two pure substances.

Types of solution: on the basis of state of solution

1. Solid solution

2. Liquid solution

3.Gaseous solution

Expressing concentration of solution:

1. Molarity : The number of moles of solute present per litre of solution.

2. Molarity : The number of moles of solute present per 1000 g of solvent.

3. Mole fraction : Ratio of number of moles of components to the total moles of all the components in the solution.

Solid State

Matter exist in different states like solids, liquids, gases plasma etc. These states differ from each other due to difference in attractive forces and arrangement of constituent particles. Solid state the wide spread state of matter.

Haloalkanes and haloarenes

Introduction
Haloalkanes and haloarenes are the derivatives of aliphatic or aromatic hydrocarbon obtained by replacement of one or more hydrogen atoms by equal number of halogen atoms respectively.

Importance of haloalkanes ond haloarens 
1.Chloramphenicol is very effective in treatment of typhoid fever.
2.Chloroquine is used for the treatment of malaria fever.