Advertisements
Advertisements
प्रश्न
Pick from the following one chemical used to disinfect water.
पर्याय
Chlorine
Washing soda
Silica
Coal
Advertisements
उत्तर
Chlorine
Explanation:
During wastewater treatment, disinfectant like chlorine is added to the water to kill harmful microorganisms.
APPEARS IN
संबंधित प्रश्न
Cleaning of water is a process of removing ______.
Name the four main sources of water.
The ultimate source of all water on the earth is
Give any three important uses of water.
Explain how the peculiar variation of density of water with temperature can protect marine-life.
What are its causes and how can water pollution be controlled ?
Give balanced chemical equations to show the reaction between Magnesium and water.
Explain rain water harvesting.
How is rain produced?
Name the solute, solvent & solution in the statement – ‘sodium chloride dissolves in water to give sodium chloride solution’. Define each of the terms in italics.
Give the importance of dissolved minerals & salts.
Give a reason for the following:
Efflorescence is minimum during humid conditions.
Name the process which is responsible for the formation of droplets on the surface of a glass of cold drink. _______
Around 97% of water available on earth is ______ water.
Total earth’s surface covered by water is
In the coastal areas, wind current moves from the sea towards the land during the day; but during the night it moves from land to the sea. Discuss the reason.
Why should we not throw used tea leaves into sink?
Match the items of Column I with the items of Column II with reference to sewage.
| Column I | Column II | ||
| (a) | Inorganic impurities | (i) | phosphorus and nitrogen |
| (b) | Organic impurities | (ii) | nitrates and phosphates |
| (c) | Nutrients | (iii) | cholera and typhoid |
| (d) | Bacteria | (iv) | pesticides and herbicides |
A mixture (x) in water contains suspended solids, organic impurities, inorganic impurities (a), nutrients (b), disease-causing bacteria and other microbes. Give names for (x), (a) and (b)?
