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Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : CO2, SO2 and NO2 gases get dissolved in rain water and produce acid rain.
Reason (R) : Atmospheric air is polluted due to high concentration of gases like carbon dioxide, sulphur dioxide and oxides of nitrogen.
Select the correct answer from the codes given below :
Explanation
Acid rain is caused by the chemical reaction of compounds like sulphur dioxide (SO2) and nitrogen oxides (NOx) with water molecules in the atmosphere to produce sulfuric and nitric acids. While carbon dioxide (CO2) naturally dissolves in rainwater to form weak carbonic acid (H2CO3), giving normal rain a pH of ~5.6, excessive concentrations of these gases due to industrial activities and fossil fuel combustion significantly increase acidity. The Assertion (A) is true as these specific gases are the primary precursors that dissolve in rainwater. The Reason (R) is also true because the presence of these gases in high concentrations constitutes atmospheric pollution. Since the phenomenon of acid rain is a direct consequence of this atmospheric pollution, (R) is the correct explanation of (A).
SIMILAR QUESTIONS
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : Rainfall occurs in the winter season in mediterranean climate.
Reason (R) : In summer these regions remain under the influence of dry terrestrial winds.
Select the correct answer from the code given below :
Code :
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : A solution of table salt in a glass of water is homogeneous.
Reason (R) : A solution having different composition throughout is homogeneous.
Select the correct answer from the code given below :
Code :
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : Voices of men and women are different.
Reason (R) : Length and thickness of vocal cord is different in men and women.
Select the correct answer from the code given below :
Code :
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : Babur wrote Tuzk-e-Babri in Chagatai Turki.
Reason (R) : Turki was the official language of the Mughal Court.
Select the correct answer from the code given below :
Code :