There are many important topics that we have to study in this chapter such as 

• Solution :-  Solute + Solvent = Solution
• Types of Solution on the basis of no. of components : Binary, Ternary, Quaternary and Polynary Solution.
• Types of Solution on the basis of amount of solute & salvent : Saturate, Unsaturated Super Saturated, Concentrated & Dilute Solution.
• Types of Solution on the basis of Physical State of solute & solvent : Ex.:- Alloys (Solid – Solid_, Comphar burned in air (Solid – Gas), Zin amalgam (Liquid – Solid), Soft drink (Gas – Liquid), etc
• Unit of Concentration of Solution : Physical and Chemical unit
• Types of Physical Unit : Percentage method, Gram per litre, Part Per Million (ppm)
• Types of Percentage method : Mass Percentage Volume percentage & Mass-Volume percentage
• Equivalent weight – Element, Acid , Bose, Salt and Ions.
• Some useful terms for help in study of Chemical units : Molar, Seni-molar, Deci – molar, Centir – molar, Milli – molar & Molal Solution
• Types of Chemical Unit : Molarity, Molality, Mole – Fraction, Normality & Formality.
• Vapour Pressure of Liquid : When solute is Volatile & when solute in Non – volatile

1. Relative Lowering of Vapour Pressure
2. Elevaion of Boiling Point
3. Depression in Freezimg Point
4. Onsmotic Pressure

• The low of Dilute Solution : First Law second Law
• Isotonic Solution, Hypertonic Solution and Hypotonic Solution
• Abnormal Molecular Mass : Molecular Association & Molecular Dissociation
• Ideal Solution and their Properties
• Non- Ideal Solution
• Types of Non – Ideal Solution : for +ve deviation  & for –ve deviation and their properties.
• Azeotropic Mixture or Azeotrops
• Types of Azeotrops :Minimum boiling point and Maximum boiling point
• HENRY’S  LAW