This 9th class chemistry chapter 4 test is an original ExamPaperDesk practice paper for Chapter 4, Stoichiometry. Every question is printed in both English and Urdu, so English medium and Urdu medium students can use the same paper. It carries 36 marks: 10 multiple-choice questions with a bubble sheet, 10 short questions of which you attempt any eight, and 2 detailed questions. An answer key for the MCQs is given at the end.
Before you attempt it, revise from the Class 9 Chemistry Chapter 4 textbook PDF and work through the Chapter 4 exercise questions. The Class 9 Chemistry section of ExamPaperDesk is organised into notes, test papers, online papers, guess papers, past papers and textbook PDFs, and you can already browse our Class 9 Chemistry notes and textbook PDFs.
How to Use This Chapter 4 Test
Print the paper or open it on your phone, close your book and attempt all three sections in one sitting, as you would in an exam. Fill in the bubble sheet for Section A, then check your MCQs against the answer key on the last page. For the short and detailed questions, compare your answers with the chapter in your textbook and note any topic you need to revise again.
Download the 9th Class Chemistry Chapter 4 Test PDF
What the Chapter 4 Test Covers: Stoichiometry
The paper is set across the whole of Chapter 4 rather than one exercise, so it is a fair check of whether the chapter is finished. Questions are drawn from:
- The mole concept and Avogadro number.
- Relative atomic mass, molecular mass and formula mass.
- Converting between mass, moles and number of particles.
- Molar volume of a gas at standard temperature and pressure.
- Empirical and molecular formulas, and calculating one from the other.
- Stoichiometric calculations from a balanced equation, including limiting reactant.
Facts You Need Before Attempting It
Most of the marks in Stoichiometry hang on a small number of statements being exactly right:
- One mole contains 6.02 times ten to the twenty-third particles, which is Avogadro number.
- One mole of any gas occupies 22.4 dm cubed at standard temperature and pressure.
- The empirical formula gives the simplest whole-number ratio of atoms; the molecular formula gives the actual number.
Where Marks Go Missing in This Chapter
- Using 22.4 dm cubed for a liquid or solid rather than a gas.
- Forgetting to balance the equation before doing a stoichiometric calculation.
- Giving the molecular formula when the empirical formula was asked for.
Frequently Asked Questions
What is a mole?
The amount of substance containing 6.02 times ten to the twenty-third particles, which is Avogadro number. One mole of any substance has a mass in grams equal to its relative formula mass.
Is the answer key included?
An answer key for the multiple-choice section is printed at the end of the paper. The written sections should be marked against your textbook and the solved chapter notes.
Related Class 9 Chemistry Resources
Continue with Chapter 3 test and Chapter 5 test. Everything for the subject is collected on the Class 9 Chemistry page, including the solved chapter notes and the rest of the Class 9 Chemistry test papers.