Class 9 Exam > Class 9 Videos > Is Matter Around Us Pure I : CBSE Class 9 Science Animated Video Lectures in English & Hindi
Is Matter Around Us Pure I : CBSE Class 9 Science Animated Video Lectures in English & Hindi Video Lecture
FAQs on Is Matter Around Us Pure I : CBSE Class 9 Science Animated Video Lectures in English & Hindi Video Lecture
| 1. What is the meaning of "Matter Around Us Pure" in CBSE Class 9 Science? |  |
Ans. "Matter Around Us Pure" is a chapter in CBSE Class 9 Science that deals with the concept of purity of substances and various methods of separation of mixtures.
| 2. What is the difference between pure substances and mixtures? | |
Ans. Pure substances are made up of only one type of particle, either atoms or molecules, and have a fixed composition. Mixtures, on the other hand, are composed of two or more substances that are physically combined and can be separated by physical methods.
| 3. What are the different methods of separation of mixtures mentioned in the chapter? | |
Ans. The chapter discusses several methods of separation of mixtures, including filtration, evaporation, distillation, chromatography, and fractional distillation.
| 4. How does filtration work as a method of separation? | |
Ans. Filtration is a method of separating solid particles from a liquid or gas by passing the mixture through a porous material called a filter. The filter allows the liquid or gas to pass through while retaining the solid particles.
| 5. What is chromatography and how is it used for separation? | |
Ans. Chromatography is a technique used to separate the components of a mixture based on their differential solubilities and adsorption properties. It involves the separation of substances using a stationary phase (like a filter paper) and a mobile phase (like a solvent). The different components of the mixture move at different rates and can be identified based on their separation distances on the chromatogram.
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Nov 15, 2024 Last updated |
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