हिंदी

Cleaning of water is a process of removing ______.

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प्रश्न

Cleaning of water is a process of removing ______.

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उत्तर

Cleaning of water is a process of removing pollutants.

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अध्याय 13: Wastewater Story - Exercises [पृष्ठ १६४]

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एनसीईआरटी Science [English] Class 7
अध्याय 13 Wastewater Story
Exercises | Q 1. (a) | पृष्ठ १६४

संबंधित प्रश्न

Name the four main sources of water.


Give balanced chemical equation for the reaction of water with Sodium oxide.


What is metal activity series ?


Give the molecular formula of water ?


Give reason of Icebergs float on ocean water.


Give reason of Carbonated drinks are bottled under high pressure.


Which property of water enables it to modify the climate?


State the importance of the solubility of CO2 and O2 in water.


Identify A, B, C and D; first one is done for you.


Explain why:

Rain water does not leave behind concentric rings when boiled.


Give a balanced equation for the following conversion:

Potassium oxide to a strong alkali.


Explain the following observation:

Washing-soda become coated with a white powder when left exposed to the atmosphere.


Explain why oil spills have an adverse effect on marine life.


Select the correct word from the words in option to complete the sentence:

Dissolved air in water contains a ____ percentage of oxygen than ordinary air.


True or false? Correct the wrong statement.

We get rainwater throughout the year.


Among the given options, which one is not correct for the use of large amounts of fertilisers and pesticides?


Which of the following does not show water shortage?


A jumbled word is given here. Write the correct form of the word.

CHARREGE


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)?


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