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Question

Which of the following acid does not react with metals ?

A
Sulphuric acid
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B
Phosphoric acid
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C
Carbonic acid
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D
Nitric acid
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Solution

The correct option is C Carbonic acid
Carbonic acid because it is a weak acid and does not dissociate completely in hydrogen ion in aqueous solution where are sulphuric acid, phosphoric acid, and nitric acid are a strong acid. They dissociate completely in aqueous solution form hydrogen ions and radicles. These radicals react with metal to form stable compounds.
For example:
6Na+2H3PO42Na3PO4+3H2
2Na+H2SO4Na2SO4+H2
2Na+2HNO32NaNO3+H2
Na+H2CO3No Reaction

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