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Question
Taj is damaged due to acid rain. This phenomenon is famously known as __.
Taj is damaged due to acid rain. This phenomenon is famously known as __.
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Solution
The correct option is B Marble cancer
Oxides of nitrogen and sulphur form acids when they react with water vapour present in the atmosphere. Nitrogen dioxide forms nitric acid whereas sulphur dioxide forms sulphuric acid on reaction with water vapour. Their presence in rain turns it acidic and this is known as the 'acid rain'. Since Taj Mahal is made up of marble, this acid rain reacts with marble and corrodes it. Therefore, it is called marble cancer.
Marble cancer
Oxides of nitrogen and sulphur form acids when they react with water vapour present in the atmosphere. Nitrogen dioxide forms nitric acid whereas sulphur dioxide forms sulphuric acid on reaction with water vapour. Their presence in rain turns it acidic and this is known as the 'acid rain'. Since Taj Mahal is made up of marble, this acid rain reacts with marble and corrodes it. Therefore, it is called marble cancer.
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