Advertisements
Advertisements
प्रश्न
Pick from the following one chemical used to disinfect water.
विकल्प
Chlorine
Washing soda
Silica
Coal
उत्तर
Chlorine
Explanation:
During wastewater treatment, disinfectant like chlorine is added to the water to kill harmful microorganisms.
APPEARS IN
संबंधित प्रश्न
Why is water essential for life?
Give balanced chemical equation for the reaction of water with Sodium oxide.
The solubility of a gas in water.............. with rise in temperature and.......................with rise in pressure.
The ultimate source of all water on the earth is
Answer the following question:
Name two gases dissolved in natural water.
Water exists in all three states. Discuss.
Name a ‘pure form’ and an,‘impure form’ of water in the natural state.
Give a balanced equation for the following conversion:
Magnesium bicarbonate in temporary hard water to magnesium carbonate by boiling.
Name a deliquescent substance’.
Define ‘eutrophication’.
Give a reason for the following:
Efflorescence is minimum during humid conditions.
Total earth’s surface covered by water is
How is the life of organisms living in water affected when water gets polluted?
The jumbled word is given here. Write the correct form of each word.
QUIFERA
From where do the following usually get water? In which form is water present in them?
Animals
Animal waste, oil and urea are some of the organic impurities present in sewage. Name two more organic impurities present in sewage
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)?
Fill in the blanks in the following statements using words given in the box.
air, handpumps, cholera, water, large, ground
A very _________ number of our people defecate in the open. It may cause _________ pollution and soil pollution. Both the surface water and _________ water get polluted. _________ water is the source for wells, tubewells and _________. Thus it becomes the most common route for _________ borne diseases like _________, dysentery, etc.
What is water?
