Simply Explaination about the Melting and Boiling Points changing matter in Solid and on Liquid at Atmospheric Pressure and also some unit and about Atmospheric Pressure or Pressure in this Audio Podcast, we will share this all abouts the 1st Chapter of our Class 9th and that mainly include in Chemistry but in text combined and we take the reference topics from our NCERT text books and it's presented by "Srj Science Hub", an Educational branch of Srj Group founnded by Suraj Singhaniya whom abbreviation named as "Srj".