Roy's classes

This channel is created to provide valuable information to the students. Those students, are interesting may get various lectures on physical science of ix and x, chemistry of xi and xii. I want to provide all necessary guidance to my students 24 X 7 . During vacation and off hour students may use this platform for doubt clear, they may ask question and leave comments for further information.
Prosanti Choudhury
M sc chemistry
Assistant teacher of government aided school
Kolkata