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Why should we not throw used tea leaves into sink? - Science

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प्रश्न

Why should we not throw used tea leaves into sink?

लघु उत्तर
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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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पाठ 18: Wastewater Story - SHORT ANSWER QUESTIONS [पृष्ठ ९५]

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

संबंधित प्रश्‍न

Name the gas produced when steam is passed over hot coke.


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


Give one word  for the following statement:

The gaseous form of water found in air .


Two gases found dissolved in natural water are


Explain how the peculiar variation of density of water with temperature can protect marine-life.


What do you mean by water pollution ?


Answer the following question.
Suggest three ways to conserve water.


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


Define
Henry's law


Explain why:

Fused CaCl2 or conc. H2SO4 is used in a desiccator.


What do you understand by permanent hardness?


Give a reason why alcohol and water form a miscible mixture while oil & water do not.


Give the importance of dissolved air – in water.


State the meaning of the term ‘water pollution’. State how you would find out, the different sources of pollution of water bodies in the locality.


Household detergents contain mainly ______ and pollute water bodies.


Give a reason for the following:

Efflorescence is minimum during humid conditions.


Around 97% of water available on earth is ______ water.


State whether the following statement is True or False. If false, give the correct statement.

51% of the earth’s surface is covered with water


Match Column I with Column II

Column I Column II
(a) Ground water (i) Solid form of water
(b) Bawri (ii) Wastage of water
(c) Snow (iii) Water management
(d) Drip irrigation (iv) Small water
(e) Leaking taps (v) Water table

What is water?


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