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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

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true but (R) is not the correct explanation of (A)

C

(A) is true statement but (R) is false

D

Both (A) and (R) are false

Text Solution

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The correct Answer is:
B
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Assertion : CO_2 and methane are called greenhouse gases. Reason : These - radiate heat and radiations cause global warming.

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

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. Which of the following is growing at a fastre 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. As a result of freenhouse effect , thers can be : A: an increase in rate of egvaporation of water thus, untimely more rain , floodingn tec . B: tropical storms in certain parts of the workd C: a decrease in pH of the soil D: an increase in pH of the soil select correct altemate :

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?.

Rearrange the following six sentences A, B, C, D, E and F in the proper sequence to form a meaningful paragraph, then answer the questions given below them. A. Building of these structures requires a lot of fuel to be burnt which emits a large amount of carbon dioxide in the atmosphere. B. The major source of carbon dioxide is power plants. C. Another twenty per cent of carbon dioxide emitted in the atmosphere comes from burning of gasoline in the engines of vehicles. D. Buildings, both commercial and residential represent a larger source of global warming pollution than the said cars and trucks. E. The major cause of global warming is the emission of greenhouse gases like carbon dioxide, methane, nitrous oxide, etc. into the atmosphere. F. These power plants emit large amounts of carbon dioxide produced from burning of fossil fuels for the purpose of electricity generation. Which of the following should be the SECOND sentence after rearrangement?

Rearrange the following six sentences A, B, C, D, E and F in the proper sequence to form a meaningful paragraph, then answer the questions given below them. A. Building of these structures requires a lot of fuel to be burnt which emits a large amount of carbon dioxide in the atmosphere. B. The major source of carbon dioxide is power plants. C. Another twenty per cent of carbon dioxide emitted in the atmosphere comes from burning of gasoline in the engines of vehicles. D. Buildings, both commercial and residential represent a larger source of global warming pollution than the said cars and trucks. E. The major cause of global warming is the emission of greenhouse gases like carbon dioxide, methane, nitrous oxide, etc. into the atmosphere. F. These power plants emit large amounts of carbon dioxide produced from burning of fossil fuels for the purpose of electricity generation. Which of the following should be the THIRD sentence after rearrangement?

Rearrange the following six sentences A, B, C, D, E and F in the proper sequence to form a meaningful paragraph, then answer the questions given below them. A. Building of these structures requires a lot of fuel to be burnt which emits a large amount of carbon dioxide in the atmosphere. B. The major source of carbon dioxide is power plants. C. Another twenty per cent of carbon dioxide emitted in the atmosphere comes from burning of gasoline in the engines of vehicles. D. Buildings, both commercial and residential represent a larger source of global warming pollution than the said cars and trucks. E. The major cause of global warming is the emission of greenhouse gases like carbon dioxide, methane, nitrous oxide, etc. into the atmosphere. F. These power plants emit large amounts of carbon dioxide produced from burning of fossil fuels for the purpose of electricity generation. Which of the following should be the FIRST sentence after rearrangement?

GRB PUBLICATION-ENVIRONMENTAL ISSUES-Assertion & Reason Type Questions
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