Equilibrium class 11 cbse NCERT Chemical reactions and equations class 10 CBSE Some basic terms in thermodynamics ( introductory terms) (other ppt can also be used !) Classification of elements and periodicity in properties class 11th chapter 3 (ncert) Surface chemistry ppt CLASS 12 CBSE CHAPTER 5 Electrochemistry class 12 ( a continuation of redox reaction of grade 11) Empirical and molecular formula class 11 Chapter 1 some basic concepts of chemistry class 11 UPDATED PPT Electrophilic substitution reaction..ncert HYDROCARBONS Aromatic hydrocarbon -HYDROCARBONS Alkynes -HYDROCARBONS class 11 Alkenes and their preparation-HYDROCARBONS PART 2 Preparation of alkanes class 11-HYDROCARBONS (PART 1) 
