Non-Metals
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About this topic
This topic provides an in-depth study of selected non-metals and their compounds, including oxygen, nitrogen, chlorine, sulphur, carbon, and silicon, as detailed in the Zambian Form 4 syllabus. You will learn about their preparation in the laboratory, physical and chemical properties, industrial manufacture, and wide-ranging uses. This includes environmental chemistry aspects like ozone layer protection and carbon cycle implications. ECZ exams commonly test the preparation, properties, and tests for gases like oxygen, ammonia, chlorine, and carbon dioxide. Competence in this area is crucial for answering descriptive and practical-based questions, and it builds a comprehensive understanding of the chemistry of common elements and their impact on society and the environment.
What you'll practise (13 questions)
- Which non-metal exists as a diatomic molecule in standard conditions?
- In the preparation of hydrogen chloride gas, name the reactants A and B.
- What is the purpose of concentrated sulphuric acid in the wash bottle?
- Describe the chemical test for hydrogen chloride gas.
- State any physical property of hydrogen chloride.
- Give a use of hydrogen chloride gas in industry.
- What is the purpose of concentrated sulphuric acid in the preparation of sulphur dioxide?
- Describe a chemical test for sulphur dioxide.
- Describe how the sulphur trioxide is safely converted into sulphuric acid.
- State one commercial use of sulphuric acid.
- The diagram shows the laboratory preparation and collection of a gas. Which one of the following statements below is true?
- Three dry test tubes were filled with three different gases and placed in a trough of water. After a short time the water had risen in two of the tubes as shown in the diagram. Which gases could the tubes have contained?
- What is the test for chlorine gas?
Answer each question above to see the correct answer and a full explanation.