हिंदी

Why should we not throw used tea leaves into sink?

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प्रश्न

Why should we not throw used tea leaves into sink?

लघु उत्तरीय
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उत्तर

Used tea leaves should not be thrown in kitchen sinks as they clog drains and prevent the free flow of oxygen that interferes with the decomposition process. They should be thrown in dustbins.

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अध्याय 18: Wastewater Story - SHORT ANSWER QUESTIONS [पृष्ठ ९५]

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एनसीईआरटी एक्झांप्लर Science [English] Class 7
अध्याय 18 Wastewater Story
SHORT ANSWER QUESTIONS | Q 18. (a) | पृष्ठ ९५

संबंधित प्रश्न

Why is water essential for life?


Give balanced chemical equation for the reaction of water with Iron . 


Give balanced chemical equation for the reaction of water with Carbon dioxide.


.................... is the purest form of natural water.


Describe the water-cycle in nature.


State whether the given statement are true or false. If true, write the reason.
Water availability per person in India is declining.


Why is water considered a compound?


Of the total water available on the earth, fresh water forms ______ percent.


What is meant by the term ‘oil spill’?


State the causes of ‘eutrophication’.


Match the terms in List I with the correct answers in List II.

List I List II
1. Solubility in a given solvent decreases with an increase in temperature. A: Na2SO4.10H2O
2. A white efflorescent crystal B: NaOH
3. A hygroscopic dehydrating agent C: Ca(HCO3)2
4. A deliquescent alkali D: conc. H2SO4
5. A substance present in temporary hard water E: CaSO4 

What happens when a spoonful of sugar, sawdust, and soil are added to a glass of water?


________ of water is in oceans and seas.


Look at the map of Tamilnadu showing annual rainfall and answer the questions given below

  1. Identify the districts that get only low annual rainfall in Tamilnadu.
  2. Identify the districts that get a medium annual rainfall in Tamilnadu.
  3. State the districts that enjoy high annual rainfall in Tamilnadu.

Water changes to ice at ______.


Nitrogen is used for the treatment of drinking water.


From where do the following usually get water? In which form is water present in them?

Aquifer


Think and suggest some ways to minimise waste and pollutants at their source, taking your home as an example.


What is water?


Fill in the blanks selecting words from the following list

snow, rain, clouds, vapour, evaporation, transpiration.

Water, as ______ goes into atmosphere by the processes of ______ and ______ and forms ______, which on condensation fall in the form of ______ and ______.


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