chemistry class 9

Chemistry Class 9 Chapter 3 Important MCQs Federal Board

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Chemistry Class 9 Chapter 3 Important mcqs Federal Board Periodic Table and Periodicity of Properties Important Multiple Choice Questions 1) Total number of periods in the periodic table are ___. A) 7 B) 8 C) 11 D) 10 Answer: A (7) 2) An element whose last electron enters into s-subshell is a ___ block element. …

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What Branch of Chemistry is the Study of Components and Composition of Substances

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Identifying examples of different branches of chemistry class 9 chemistry chapter 1 notes: 1. Photosynthesis produces glucose and oxygen from CO2 and H2O in the presence of chlorophyll and sunlight. 2. Plantation helps in overcoming the Greenhouse effect. 3. Haber’s process converts large quantities of hydrogen and nitrogen into ammonia.  4. Ammonia is a colourless …

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