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The gaseous envelope around the earth is known as atmosphere. The lowest layer of this is extended upto 10 km from sea level, this layer is ______.

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प्रश्न

The gaseous envelope around the earth is known as atmosphere. The lowest layer of this is extended upto 10 km from sea level, this layer is ______.

विकल्प

  • Stratosphere

  • Troposphere

  • Mesosphere

  • Hydrosphere

MCQ
रिक्त स्थान भरें
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उत्तर

The gaseous envelope around the earth is known as atmosphere. The lowest layer of this is extended upto 10 km from sea level, this layer is troposphere.

Explanation:

Troposphere is correct since the lowest region of atmosphere in which the human beings along with other organisms live is called troposphere. It extends up to the height of approx. 10 km from sea level. 

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Atmospheric Pollution - Tropospheric Pollution - Gaseous Air Pollutants
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 14: Environmental Chemistry - Multiple Choice Questions (Type - I) [पृष्ठ १७७]

APPEARS IN

एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 11
अध्याय 14 Environmental Chemistry
Multiple Choice Questions (Type - I) | Q 8 | पृष्ठ १७७

संबंधित प्रश्न

Carbon monoxide gas is more dangerous than carbon dioxide gas. Why?


List gases which are responsible for greenhouse effect.


Statues and monuments in India are affected by acid rain. How?


What would have happened if the greenhouse gases were totally missing in the earth’s atmosphere? Discuss.


The acids present in acid rain are:

(i) Peroxyacetylnitrate

(ii) H2CO3 

(iii) HNO3

(iv) H2SO4 


Some time ago formation of polar stratospheric clouds was reported over Antarctica. Why were these formed? What happens when such clouds break up by warmth of sunlight?


Match the terms given in Column I with the compounds given in Column II.

Column I Column II
(i) Acid rain (a) CHCl2 – CHF2
(ii) Photochemical smog (b) CO
(iii) Combination with haemoglobin (c) CO2
(iv) Depletion of ozone layer (d) SO2
  (e) Unsaturated hydrocarbons

Match the pollutant(s) in Column I with the effect(s) in Column II.

Column I Column II
(i) Oxides of sulphur (a) Global warming
(ii) Nitrogen dioxide (b) Damage to kidney
(iii) Carbon dioxide (c) ‘Blue baby’ syndrome
(iv) Nitrate in drinking water (d) Respiratory diseases
(v) Lead (e) Red haze in traffic and congested areas

Match the pollutants given in Column I with their effects given in Column II.

Column I Column II
(i) Phosphate fertilisers in water (a) BOD level of water increases
(ii) Methane in air (b) Acid rain
(iii) Synthetic detergents in water (c) Global warming
(iv) Nitrogen oxides in air (d) Eutrophication

Assertion (A): Carbon dioxide is one of the important greenhouse gases.

Reason (R): It is largely produced by respiratory function of animals and plants.


Green plants use carbon dioxide for photosynthesis and return oxygen to the atmosphere, even then carbon dioxide is considered to be responsible for greenhouse effect. Explain why?


Explain how does greenhouse effect cause global warming.


Which of the following is a secondary pollutant?  


Match List - I with List - II.

List - I List - II

(a)

\[\ce{2SO2(g) + O2(g) -> 2SO3(g)}\] (i) Acid rain
(b) \[\ce{HOCl(g) ->[hv] \overset{\bullet}{O}H + \overset{\bullet}{C}l}\] (ii) Smog
(c) \[\ce{CaCO3 + H2SO4 -> CaSO4 + H2O + CO2}\] (iii) Ozone depletion
(d) \[\ce{NO2(g) ->[hv] NO(g) + O(g)}\] (iv) Tropospheric pollution

Choose the correct answer from the options given below.


The gas released during anaerobic degradation of vegetation may lead to ______.


Assertion (A): Ozone is destroyed by CFCs in the upper stratosphere.

Reason (R): Ozone holes increase the amount of UV radiation reaching the earth.


Thermal power plants can lead to ______.


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