9th Class Chemistry Notes Chapter 7 Long Questions PDF - Acid-Base Chemistry

Descriptive questions for Unit 7, Acid-Base Chemistry, of the new 9th class Chemistry course. Each question carries its textbook exercise reference, and the answers are written at the length an annual paper question expects, with the working shown where a calculation is involved.

• Class: 9th (Matric Part 1)
• Subject: Chemistry, English Medium
• Unit 7: Acid-Base Chemistry
• Question type: Descriptive, long answer questions
• Answer style: definitions, worked calculations and comparison tables under clear sub-headings
• Syllabus: New PECTAA syllabus for Punjab Boards, sessions 2025-26 and 2026-27
• Format: PDF, with the textbook figures and structures kept in

Ground covered by these descriptive answers:

• The Arrhenius concept of acids and bases, set out with examples
• Dissociation of hydrogen chloride and of sodium hydroxide in water
• Typical Arrhenius acids such as HCl, HNO3, H2SO4 and HCN
• The role water plays, and why the proton exists as the hydronium ion
• How water molecules arrange themselves around a hydrogen ion

Get the PDF from taleem360.com and use it alongside your textbook while you prepare this unit.