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Assertion (A) : Methane component of gre...

Assertion (A) : Methane component of greenhouse gases contributing to global warming is about 20 per cent.
Reason (R) : Introduction of multi-point fuel injection engines in automobiles has decreased methane content in the exhausts.

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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Assertion : Deforestation is one main factor contributing to global warming . Reason : Besides CO_(2) , two other gases, methane and CFCs are also included in GHGs.

CO_2 and H_2 O absorbs strongly in the infrared region and its presence in the atmosphere decreases the loss of heat from the earth by radiation . This global warming is called the greenhouse effect (other gases , including the oxides of nitrogen from car exhaust freons from aerosols and refrigerators and methane from bacteria in the soil and in the rumen cows , also add to the greenhouse effect ). The concentration of atmospheric CO_2 has increased by 10% . The is resulting in the increase in the mean temperature of the earth by 2. 5^@ C , varying form 2^@ C the equator to 4^@ C at the poles . This could have dramatic effects on the climate. Which of the following is growing at a faster rate than CO_2 and thus responsible for the greenhouse effect ?

CO_2 and H_2 O absorbs strongly in the infrared rrgion and its presence in the atmospheere dectrases the loss fo heat form the enrth by radistiion . This global warming is called the greenhouse effect (other gases , including the oxides of nitraongen form car exhauset freons from aerosols and refrigeratirs and methane from bacteria in the soil and in the rument cows , also add to the reeenhouse effect ). The concentration fo atmospheric CO_2 has increased by 10% . The is rsulting in the increase in the mean temperature fo the earth by 2. 5^@ C , varying form 2^@ C t the equlator to 4^@ C at the poles . This could have dramatic effects on the climate. Instead of monitoring carbon dioxide suggest another gas that scientists could studey to substantiate the fact that CO_2 conentration is steadily increasing in the atmosphere ?

CO_2 and H_2 O absorbs strongly in the infrared rrgion and its presence in the atmospheere dectrases the loss fo heat form the enrth by radistiion . This global warming is called the greenhouse effect (other gases , including the oxides of nitraongen form car exhauset freons from aerosols and refrigeratirs and methane from bacteria in the soil and in the rument cows , also add to the reeenhouse effect ). The concentration fo atmospheric CO_2 has increased by 10% . The is rsulting in the increase in the mean temperature fo the earth by 2. 5^@ C , varying form 2^@ C t the equlator to 4^@ C at the poles . This could have dramatic effects on the climate. The equilibrium constant (K_(p)) for the reaction 2CO_((g))underset(larr)(rarr)2CO_(2(g)) is 1.4xx10^(90) at 25^(@)C . Given this enormous value, why does not CO convert totally into CO_(2) in the troposphere?.

Select the mismatched pairs w.r.t. relative contribution of various green house gases to totral global warming: (a) CFCs - 20% (b) N_2O -6% © Carbon dioxide - 60% (d) Methane - 14%

TRUEMEN BIOLOGY ENGLISH-Ecology -ASSERTION AND REASON
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  2. [A] : Leaf butterfly & stick insect show mimicry to dodge their enemi...

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  3. [A] : In a food chain , membrane of successive higher levels are fewer...

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  4. Assertion (A) : Methane component of greenhouse gases contributing to ...

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  5. Assertion: Suspended particulate matter(SPM) is an important pollutant...

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  6. Assertion : Age sex structure of human population in countries like Fr...

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  7. Assertion (A) : Presently, the global atmosphere is warming up. Reas...

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  8. [A] : Ozone depletion at the south pole will threats world's fisheries...

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  9. [A] : Inquilines can not survive without human care . [R] : Cultige...

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  10. [A] : Problems of ecological environment arise from over population....

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  11. [A] : Social forestry programme is grows trees for fuel , fodder & fru...

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  12. [A] : Cultigens (domesticated animals & cultivated plants ) are not in...

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  13. [A] : Population density of indicator organisms show degree of water p...

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  14. [A] : Traffic Jams cause giddiness , reduced vision , exhaustion etc ....

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  15. [A] : Thermal pollution is harmful to fishes . [R] : Heating cause...

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  16. [A] : Stratosphere is an excellent region for air travel . [R] : Be...

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  17. [A] : Using dung as fuel greatly reduces grain production . [R] : Du...

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  18. Assertion : Lichens are a pioneer community in the temperate region. ...

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  19. Assertion: Global water cycle does not involve the living organisms. ...

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  20. [A] : Life occurs upto 15000 m in the air on mountains . [R] : At gr...

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