Fermentation by Yeast (NCERT Class- 8, Science, Chapter- 2 "Microorganisms: Friend and Foe")
Channel: Ravi Dewangan
Date: 03/05/2020

Online classes by Ravi 
Dewangan. This video will be useful for all the students studying in in CBSE schools using NCERT textbook. Mainly focusing the students of Kendriya Vidyalayas and Navodaya Vidyalayas. This this is equally useful for state ports and other boards also. This topic is first observed by students of class 8 in in Science subject chapter number 2 two microorganisms friend and foe. Inside this chapter useful microorganisms aur friendly microorganisms are discussed by giving two activities of making a bread and preparing alcohol in the laboratory. Fermentation is a very small but a very important topic in the syllabus of class 8. Understanding the concept of fermentation is required for Science students of class 9th 10th and 11th also. This topic is equally useful for all the aspirants facing the competitive exams of Banking, Railway, SSC, VYAPAM, PSC/PCS, Teachers under general studies and general science. 
In this video a series of slides of PowerPoint presentation on the fermentation by the Yeast is explained. This video give brief idea about yeast, its structure and reproduction. This video mainly focuses on on the two activities given in in NCERT textbook namely activity 2.3 and activity 2.4. these two activities classroom demonstration of two industries respectively baking industry and alcohol industry. In this video description and availability of yeast powder is also explained. The yeast powder can be purchased @ 30 to 40 rupees per 25 gram packet.