10th Class Chemistry Chapter 1 Lecture 2 || Sublimation & Deposition Explained || New Book 2026

Learn 10th Class Chemistry New Book 2026 Chapter 14 “States of Matter and Phase Changes” with easy Urdu/Hindi explanation. In this lecture, we discuss the effect of external pressure on evaporation and boiling, sublimation, deposition, and applications of sublimation according to the latest Punjab Board / PECTAA syllabus. Students will learn how atmospheric pressure affects boiling point, why evaporation increases at low pressure, and how sublimation occurs without melting. Real-life examples such as dry ice, naphthalene balls, air fresheners, and sublimation printing are explained in a simple and conceptual way. Topics Covered: Effect of External Pressure on Evaporation Effect of Pressure on Boiling Point Boiling Point in Karachi vs Murree Sublimation Deposition Applications of Sublimation Solid Air Fresheners Sublimation Printing This lecture is helpful for: ✔ Matric Students ✔ Punjab Board Students ✔ Board Exam Preparation ✔ MCQs and Short Questions ✔ Conceptual Learning Subscribe for complete 10th Class Chemistry New Book 2026 lectures, solved exercises, MCQs, notes, and numericals.