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

Options: (A) Both the statements are individually true and statement II is the correct explanation of statement I | (B) Both the statements are individually true but statement II is not the correct explanation of statement I | (C) Statement I is true but statement II is false | (D) Statement I is false but statement II is true

ExamRobot · Accepted Answer

Correct answer: (B) Both the statements are individually true but statement II is not the correct explanation of statement I. Explanation: Statement I is true: Sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) are common atmospheric pollutants that dissolve in falling raindrops or atmospheric moisture due to their solubility.Statement II is true: These dissolved oxides react with water and oxygen to form oxyacids (like sulfuric and nitric acid). These acids increase the hydrogen ion concentration, making the rainwater acidic.Logic: Although both statements are correct, Statement II describes the result of the process mentioned in Statement I. In an Assertion-Reason setup, the 'Reason' must explain 'Why' the 'Assertion' happens. The fact that the rain becomes acidic (Statement II) does not explain why the oxides dissolve in it (Statement I). Thus, while both are true, Statement II is not the correct explanation of Statement I.

Change set

Question map

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.

Explanation

SIMILAR QUESTIONS

Consider the following: 1. Oxides of Hydrogen 2. Oxides of Nitrogen 3. Oxides of Sulphur Which of the above causes/cause acid rain ?

Statement I: After cutting an apple or a banana, the colour of the cut surface becomes brown. Statement II: Polyphenolic compounds present in fruits get oxidized in air and show colour.

Statement I : Colour of nitrogen dioxide changes to colourless at low temperature. Statement I : At low temperature Nitrogen tetroxide (N204) is formed which is colourless.

Consider the following statements : Statement-I : Rainfall is one of the reasons for weathering of rocks. Statement-II : Rain water contains carbon dioxide in solution. Statement-III : Rain water contains atmospheric oxygen. Which one of the following is correct in respect of the above statements ?