2016 · Q42
Which of the following statements is / are correct?
- 1Acid rain reacts with buildings made from limestone
- 2Burning of sulphur containing coal can contribute to acid rain
- 3Eutrophication is an effective measure to control pollution
Select the correct answer using the code given below :
General KnowledgeChemistry
- A1 and 2 only
- B2 and 3 only
- C1 only
- D1, 2 and 3
Explanation
Statement 1 is correct: acid rain (sulphuric and nitric acids) reacts with limestone (calcium carbonate) buildings, dissolving the stone. Statement 2 is correct: burning sulphur-containing coal releases sulphur dioxide, which oxidises to sulphur trioxide and forms sulphuric acid in rain. Statement 3 is wrong: eutrophication, the nutrient enrichment of water bodies causing algal blooms and oxygen depletion, is itself a form of pollution, not a measure to control it. Only statements 1 and 2 are correct, option (A).