9th Class Chemistry Chapter 10 Test: Free Environmental Chemistry Practice Paper

This 9th class chemistry chapter 10 test is an original ExamPaperDesk practice paper for Chapter 10, Environmental Chemistry. 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 notes. 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 browse every Class 9 Chemistry test paper here.

How to Use This Chapter 10 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 10 Test PDF

What the Chapter 10 Test Covers: Environmental Chemistry

The paper is set across the whole of Chapter 10 rather than one exercise, so it is a fair check of whether the chapter is finished. Questions are drawn from:

• The composition and layers of the atmosphere.
• Major air pollutants, their sources, and their effects on health and the environment.
• Acid rain, its formation from oxides of sulphur and nitrogen, and its consequences.
• The greenhouse effect, global warming and ozone depletion.
• Water pollution, its sources and its effects.
• Water treatment, and the difference between soft and hard water.

Facts You Need Before Attempting It

Most of the marks in Environmental Chemistry hang on a small number of statements being exactly right:

• Acid rain forms when oxides of sulphur and nitrogen dissolve in atmospheric water to give sulphuric and nitric acids.
• The greenhouse effect is caused mainly by carbon dioxide, methane and water vapour trapping outgoing infrared radiation.
• Hard water contains dissolved calcium and magnesium salts, which is why it forms scum with soap.

Where Marks Go Missing in This Chapter

• Confusing the greenhouse effect with ozone depletion; they have different causes.
• Naming carbon dioxide as the cause of acid rain.
• Saying hard water is unsafe to drink, when the issue is scum and scale.

Frequently Asked Questions

What causes acid rain?

Oxides of sulphur and nitrogen, released mainly by burning fossil fuels, dissolving in atmospheric moisture to form sulphuric and nitric acids, which then fall as rain.

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 9 test and Chapter 11 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.