CBSE Class 9 Chemistry Is Matter Around Us Pure?
- Simple distillation is used for what types of mixtures?
- Why is evaporation not preferred for separation of both salt and water from a salt water mixture? What other process can be used?
- How will you separate the following: (i) Salt and sea water mixture (ii) Poison from contents of bladder (iii) Components of ink (iv) Pure alum from impure sample
- Describe the structure of the 'water condenser' used in the process of distillation. Why is water circulated through the condenser during distillation?
- On what basis does the separation of different components of black ink takes place in chromatography?
- How can we test the formation of saturated solution during the process of crystallisation?
- What do you infer from the statement "In the process of chromatography, a sample of black ink drop split up into three coloured spots on filter paper strip"?
- (a) What is the purpose of adding porcelain pieces in the distillation flask in the beginning of distillation process? (b) During distillation of salt water mixture, what remains behind in the distillation flask after completion of the distillation process and why?
- (a) Why we cannot separate common salt from common salt - water mixture using filtration? (b) How is evaporation process used to obtain common salt from sea water on a large scale?
- What is chromatography? Which is the simplest form of chromatography? What types of mixtures can be separated using this type of chromatography? What is the basis of this separation technique?
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