Purification of water
Purification of Water
Availability of pure drinking water is not possible in the big towns. Water that is available to them is obtained from ponds, rivers or lakes. This water is never pure. To make it potable, the water has to pass through a series of purifying processes as described below :-
Sedimentation tank:-
The water from pond, river or lake is led in to a sedimentation tank. A small amount of potash alum is added and the water is allowed to stand. Muddy substances present in water settle down more easily in the presence of the alum. The clear liquid is now pumped out into a filtration tank.
Filtration tank :
In this tank water has to pass through the layers of charcoal, gravel and fine sand. Water gets filtered here and becomes free from suspended impurities. This water is then led into the chlorination tank.
Chlorination :-
In this tank, water is treated with liquid chlorine or bleaching powder. Here, bacterial germs, if any, are killed and the water becomes potable.
Water is then supplied to different parts of the town through pipeline.
During the process of water purification, the water from pond, river or lake is led into a sedimentation tank. A small amount of _________ is added and the water is allowed to stand. | |||
| Right Option : C | |||
| View Explanation | |||
After alum is added to water, the next step in the water treatment process is usually: | |||
| Right Option : A | |||
| View Explanation | |||
In the process of water purification, the final purification of water is done with the help of disinfectant like chlorine. Which of the following is the correct definition of disinfectants ? | |||
| Right Option : A | |||
| View Explanation |
Students / Parents Reviews [10]
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
