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This secondary pollutant has caused sign...

This secondary pollutant has caused significant damage to the beauty of historical monuments like the Taj Mahal and Red fort. Identify the correct match of the responsible pollutant and its characteristics feature.

A

Acid rain - ratio of `H_2SO_4 and HNO_3` is 3 : 7

B

Photochemical Smog - `PAN +O_3+` Nitrogen oxides

C

Acid rain - pH of `lt 5.6`

D

Sulphur smog - formed from vapour of `H_2SO_4`

Text Solution

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The correct Answer is:
To solve the question regarding the secondary pollutant that has caused damage to historical monuments like the Taj Mahal and Red Fort, we can follow these steps: ### Step 1: Understand the Problem The question asks for a secondary pollutant that has caused significant damage to historical monuments. We need to identify the correct match of the pollutant and its characteristic feature. ### Step 2: Analyze the Options We have three options to consider: - **A. Acid rain ratio of H2SO4 and HNO3 is 3:7** - **B. Photochemical smog containing ozone and nitrogen oxides** - **C. Acid rain with a pH of less than 5.6 and sulfur smog formed from the vapors of H2SO4** ### Step 3: Identify the Pollutant From our knowledge, acid rain is known to cause damage to buildings, especially those made of marble, such as the Taj Mahal. Acid rain occurs when sulfur dioxide (SO2) and nitrogen oxides (NOx) are released into the atmosphere and combine with water vapor, leading to precipitation with a low pH. ### Step 4: Evaluate the Characteristics - **Option A** mentions a specific ratio of acids but does not directly relate to the damage caused to monuments. - **Option B** refers to photochemical smog, which is more related to urban air pollution and not specifically to the damage of historical monuments. - **Option C** correctly identifies acid rain as having a pH of less than 5.6, which is a characteristic feature of acid rain that leads to the erosion of marble and stone structures. ### Step 5: Conclusion Based on the analysis, the correct answer is **Option C: Acid rain with a pH of less than 5.6**. This is the pollutant responsible for significant damage to monuments like the Taj Mahal and Red Fort.
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