9th Class Chemistry Notes Chapter 4 MCQs PDF - Stoichiometry

These are the multiple choice questions for Unit 4, Stoichiometry, from the new 9th class Chemistry book followed by the Punjab boards. The textbook exercise MCQs come first, then a longer set of additional MCQs arranged topic by topic, and the answer key sits at the end of the file.

• Class: 9th (Matric Part 1)
• Subject: Chemistry, English Medium
• Unit 4: Stoichiometry
• Question type: Multiple choice questions
• Total MCQs: 52, followed by an answer key table
• Syllabus: New PECTAA syllabus for Punjab Boards, sessions 2025-26 and 2026-27
• Format: PDF, ready to read or print

Topics the questions are drawn from:

• Moles, and working out how many are present in a given mass
• Molar mass and formula mass, with H2SO4 and H3PO4 as worked cases
• Avogadro's number and the count of particles in one mole
• Mass of a single molecule, and converting between amu and grams
• Pairs of substances that hold the same mass or the same number of ions

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