This 9th class chemistry chapter 5 test is an original ExamPaperDesk practice paper for Chapter 5, Energetics. 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 5 textbook PDF. 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 5 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 5 Test PDF
What the Chapter 5 Test Covers: Energetics
The paper is set across the whole of Chapter 5 rather than one exercise, so it is a fair check of whether the chapter is finished. Questions are drawn from:
- Exothermic and endothermic reactions, and the sign convention for enthalpy change.
- Energy level diagrams for both kinds of reaction.
- Bond breaking as an energy-absorbing process and bond making as energy-releasing.
- Activation energy and the effect of a catalyst on it.
- Heat of reaction, heat of formation, heat of combustion and heat of neutralisation.
- Calculating enthalpy change from given data.
Facts You Need Before Attempting It
Most of the marks in Energetics hang on a small number of statements being exactly right:
- An exothermic reaction releases heat and has a negative enthalpy change; an endothermic reaction absorbs heat and has a positive one.
- Breaking bonds always absorbs energy and forming bonds always releases it.
- A catalyst lowers the activation energy but does not change the enthalpy change of the reaction.
Where Marks Go Missing in This Chapter
- Giving an exothermic reaction a positive enthalpy change.
- Saying a catalyst changes the enthalpy change of a reaction.
- Treating bond breaking as energy-releasing.
Frequently Asked Questions
What is the difference between exothermic and endothermic?
An exothermic reaction gives out heat, so the surroundings warm and the enthalpy change is negative. An endothermic reaction takes in heat, the surroundings cool, and the enthalpy change is positive.
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 4 test and Chapter 6 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.