Statement I : Oxides of sulfur and nitrogen present in high concentration in air are dissolved in rain drops. Statement II : Oxyacids of sulfur and nitrogen make rain water acidic.

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Q: 5 (CDS-II/2011)

Statement I : Oxides of sulfur and nitrogen present in high concentration in air are dissolved in rain drops.
Statement II : Oxyacids of sulfur and nitrogen make rain water acidic.

question_subject: 

Science

question_exam: 

CDS-II

stats: 

0,6,22,21,6,0,1

keywords: 

{'sulfur': [0, 0, 0, 4], 'oxides': [0, 0, 3, 11], 'rain drops': [0, 0, 0, 1], 'rain water': [1, 1, 0, 5], 'nitrogen present': [0, 0, 0, 1], 'oxyacids': [0, 0, 0, 1], 'nitrogen': [1, 1, 0, 2], 'air': [1, 0, 0, 0]}

Statement I states that oxides of sulfur and nitrogen present in high concentration in air are dissolved in raindrops. This statement is true as sulfur dioxide (SO2) and nitrogen oxides (NOx) released from various sources such as industrial emissions and vehicle exhaust can react with water vapor in the atmosphere to form sulfuric acid (H2SO4) and nitric acid (HNO3), respectively. These acids dissolve in rainwater and contribute to acid rain.

Statement II states that oxyacids of sulfur and nitrogen make rainwater acidic. This statement is also true as the sulfuric acid (H2SO4) and nitric acid (HNO3) formed by the reaction of sulfur dioxide (SO2) and nitrogen oxides (NOx) with water vapor are strong acids. When these acids dissolve in rainwater, they lower its pH value, making it acidic.

Option 1 states that both statements are true and statement II is the correct explanation of statement I. This option is incorrect as statement II does provide a correct explanation for statement I.

Option 2 states that both statements are true but statement II is not the correct explanation of statement I. This option is the correct answer as both statements individually are true, but statement II does not provide the