NCERT Solutions for Class 7 Science Chapter 18 Wastewater Story In Hindi PDF Download
FAQs on NCERT Solutions for Class 7 Science Hindi Chapter 18 Wastewater Story
1. Why should oils and fats not be released in the drain? Explain.
Oils and fats should not be released in the drain because the oil and fat do not dissolve in water and will continue to float on water, which will clog the pipes and affect the movement of the water in the drain. Sewage systems are built with a series of pipes connected to one another hence the release of oils and fats in drainage pipes should be avoided.
2. What is sludge? Explain how it is treated.
During wastewater treatment or sewage treatment, a slurry waste like feces, that gets accumulated, is cleaned with the help of a scrapper. This semi-solid waste is called sludge or biosolids. This is transferred to another tank. This is the tank where the waste gets decomposed. This process takes place with the help of anaerobic bacteria. In this process, the biogas released from the sludge can be used as fuel.
3. List the concepts present in Chapter 18 of NCERT Solutions for Class 7 Science.
The concepts present in Chapter 18 of NCERT Solutions for Class 7 Science are as follows:
Water our lifeline
What is sewage
Water freshens up an eventful journey
Wastewater treatment plant
Better housekeeping practices
Sanitation and diseases
An alternative arrangement for sewage disposal
Sanitation at public places
To understand the concepts well, students can make use of NCERT solutions prepared by the experts at Vedantu. The NCERT Solutions are available free of cost on the Vedantu website (vedantu.com). This will help students ace their exams.
4. How to study Chapter 18 of Class 7 Science thoroughly?
To study Chapter 18 of Class 7 Science thoroughly, students should understand the concepts in detail. By understanding the concepts, you are halfway there to your perfect score. By practising the questions given in the NCERT solutions, you will definitely be able to secure a perfect score. NCERT solutions prepared by Vedantu provide solutions for both Hindi and English medium students to help them in preparation for their exams so that they can score well. All the study material is also available on the Vedantu app.
5. What is sewage? Explain why it is harmful to discharge untreated sewage into rivers or seas.
Sewage is a liquid that contains waste that is released from households, industries, hospitals, and agricultural fields. If this untreated sewage is disposed of in the sea or rivers, it will contaminate the whole source of water and produce disease-causing bacteria. This would reach people who are unaware of the harmful organisms present in the water and cause a lot of issues. Download the NCERT solutions provided by Vedantu to understand these concepts in detail and prepare for your Class 7 Science exam.