Chemistry
The Solid State
3 Topics Some Basic Concepts of Chemistry
9 Topics Structure of Atom
14 Topics Chemical Bonding and Molecular Structure
12 Topics States of Matter Gases and Liquids
9 Topics Chemical Thermodynamics
11 Topics Equilibrium
20 Topics Redox Reactions
8 Topics Some p-Block Elements
11 Topics Hydrocarbons
13 Topics Physics
Physical World
11 Topics Units and Measurements
16 Topics Motion in a Straight Line
15 Topics Motion in a Plane
7 Topics Laws of Motion
17 Topics Work, Energy and Power
9 Topics System of Particles and Rotational
10 Topics 
Mechanism of Valence Bond Theory
[Orbital overlap concept ,Directional properties of bond , Overlapping of atomic orbital ]