Link for Chemical Equilibnrium 1:    • Chemical Equilibrium Part 1 | Chapter...  
About catalysts and catalysis,
Types of catalysts, Homogeneous and heterogeneous catalysis,
Working method of catalysis,
Activation energies of chemical reactions,
Negative catalysts or inhibitors,
Catalytic promoters or promoters,
Catalytic poisons,
Characteristics of catalysts,
Catalytic selectivity, Chemistry, Chemistry with Panda Sir, Class XI or standard XI, Help to answer better and get maximum marks,
Better understanding helps to answer the competitive exam or Entrance exam questions.