Read and download NCERT Class 9 EVS Quality of water in NCERT book for Class 9 Environmental Studies. You can download latest NCERT eBooks chapter wise in PDF format free from Studiestoday.com. This Environmental Studies textbook for Class 9 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 9 Environmental Studies to understand the answers of the exercise questions given at the end of this chapter
NCERT Book for Class 9 Environmental Studies Quality Of Water
Class 9 Environmental Studies students should refer to the following NCERT Book Quality Of Water in Class 9. This NCERT Book for Class 9 Environmental Studies will be very useful for exams and help you to score good marks
Quality Of Water NCERT Book Class 9
17. Quality of water
Background
The drinking water that we get is contaminated with various dissolved substances such as calcium, iron, aluminium salts, etc. which often cross the permissible limits. The water in extreme cases may receive effluents from factories, small textile, printing and dyeing units or farm runoffs.Outright harmful constituents such as arsenic, fluorides, copper, mercury and lead are also present in drinking water in wide parts of India. These substances cause serious ailments. It is worthwhile to find out by simple means the presence of the various impurities.
Methodology
1. Collect samples of water (about 200 ml) from different sources, e.g. handpumps, wells, tube wells, tanks, ponds, rivers and taps.
2. Filter the suspended matter from the water samples by passing through a cotton plug kept in a funnel.
3. Now take 100 ml of each sample separately.
4. Evaporate water from each sample till dry. For this, take water in a steel vessel and heat gently till all the water has evaporated.
5. Collect the dry mass separately and weigh it.
6. Identify the impurities by analysing the solid residue, if possible.
Conclusion
Draw your conclusion about the amount of dissolved matter in water.
Follow-up
If possible, find out with the help of experts/scientists the harmful constituents present in the dry mass and present it before the class and community.
Please refer to attached file for NCERT Class 9 EVS Quality of water
NCERT Book Class 9 Environmental Studies Quality Of Water
The above NCERT Books for Class 9 Environmental Studies Quality Of Water have been published by NCERT for latest academic session. The textbook by NCERT for Quality Of Water Environmental Studies Class 9 is being used by various schools and almost all education boards in India. Teachers have always recommended students to refer to Quality Of Water NCERT etextbooks as the exams for Class 9 Environmental Studies are always asked as per the syllabus defined in these ebooks. These Class 9 Quality Of Water book for Environmental Studies also includes collection of question. Along with Environmental Studies Class 9 NCERT Book in Pdf for Quality Of Water we have provided all NCERT Books in English Medium for Class 9 which will be really helpful for students who have opted for english language as a medium. Class 9 students will need their books in English so we have provided them here for all subjects in Class 9.
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