An Alpha industry was set up near Agra after some days yellowing of Taj mahal.Give reason
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Answers
Water dissolves more substances than any other known material. Pure water only stays pure until it touches something else. When water vapor condenses around a particulate floating in the air, the water may dissolve or react with the particulate. When the particulate is dust or pollen, the rain carries the particle to the ground.
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When the particulate carries or contains chemicals, a reaction can occur. As water vapor bounces around in the atmosphere, some of the water molecules react with carbon dioxide molecules to form carbonic acid, a weak acid.
This lowers the pH of the rain from 7 to about 5, depending on the concentration of carbonic acid. Natural buffers in the soil usually mediate this mildly acidic rainThe effect of acid rain on Taj Mahal structures serves as one example of how acid rain impacts buildings. Air pollution from a local refinery has caused acid rain to form, turning the white marble yellow.
Although some have argued that the yellowing is natural, or caused by iron supports in the marble, the local courts agreed that air pollution has impacted the Taj Mahal. In response, the Indian government has established local strict emission controls to help protect the Taj Mahal.
The Thomas Jefferson Memorial in Washington, D.C., is one of many monuments affected by acid rain. The dissolving calcite releases the silicate minerals contained within the marble. The loss of material weakened the structure enough that reinforcing straps were added during the 2004 restoration. In addition, a black crust left by dirt caught in the etched marble must be gently washed away.
Many sculptures throughout the United States and Europe are carved from marble or limestone. When sulfuric acid rain strikes these statues, the reaction of the sulfuric acid with the calcium carbonate yields calcium sulfate and carbonic acid. The carbonic acid further breaks down into water and carbon dioxide. Calcium sulfate is water-soluble so washes away from the statue or sculpture.
Sadly, due to acid rain statue details disappear as the stone literally washes away
Answer:
Pollutants in the air: Automobiles and industries spew out tonnes of emissions every day. ... The color of Tajmahal is turning yellow because of the SPM and other pollutants. One of the reason of pollution in Agra is dry Yamuna river which flows from the back of Tajmahal.....
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