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Preparation of Sulphuric Acid: Contact Process

Discolouratio...

Question

Discolouration of 'Taj mahal' marbles is due to

A

Dissloution of CaCO₃ by sulphuric acid

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B

Formation of photochemical smog

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C

Oxidation of NO

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D

The presence of chloroflurocarbons in atmosphere

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Solution

The correct option is A
Dissloution of CaCO₃ by sulphuric acid

Taj mahal which is formed of $C a C O_{3}$ reacts with the acids, in acidic rain and undergoes decomposition

$C a C O_{3} + H_{2} S O_{4} \to C a S O_{4} + H_{2} O + C O_{2}$

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