9th Class Chemistry Notes Chapter 5 Short Questions PDF - Energetics

Short answer questions for Unit 5, Energetics, from the new 9th class Chemistry syllabus. The exercise short questions are answered first, the additional ones are grouped under their own topic headings, and the unit closes with its Constructed Response Questions.

• Class: 9th (Matric Part 1)
• Subject: Chemistry, English Medium
• Unit 5: Energetics
• Question type: Short answer questions
• Sections: Exercise, Additional, and Constructed Response Questions
• Syllabus: New PECTAA syllabus for Punjab Boards, sessions 2025-26 and 2026-27
• Format: PDF, ready to read or print

Points these short answers cover:

• Everyday physical changes sorted into exothermic and endothermic in a table
• Why nitrogen and oxygen do not react under normal conditions
• Why lightning is enough to make nitrogen and oxygen combine to give NO
• Activation energy, explained through lighting natural gas with a match
• Why some reactions keep going once they have started

The file is free to download from taleem360.com and prints cleanly if you prefer working on paper.