class 9 chemistry notes

Identifying Examples of different branches of Chemistry | Class 9 Chemistry Chapter 1 Notes

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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Destructive distillation of Coal

What is Destructive distillation of Coal?                When coal is heated in absence of air, its destructive distillation or carbonization occurs. Main Products obtained from Destructive Distillation: Destructive distillation of coal produces the following products. Coal gas:        The coal gas is also called town gas. It is mixture of H2, CO, CH4. Hydrogen …

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Plank’s Quantum Theory of Radiations

Plank’s Quantum Theory of Radiations: In 1900, a German Physicist Max Plank had studied radiations emitted by hot black body and proposed quantum theory of radiations. Main Postulates of Plank’s Quantum Theory of Radiations: Postulates of the theory are: Energy radiated by hot bodies is not continuous, rather it is emitted in the form of …

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