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प्रश्न
What happens when concentrated nitric acid is heated and copper is added to it?
लघु उत्तर
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उत्तर
Hot concentrated nitric acid acts as a strong oxidizing agent. When copper is added to it, a vigorous reaction occurs, a blue-coloured solution of Copper nitrate is formed, and dense reddish-brown fumes of nitrogen dioxide (NO2) gas are evolved.
\[\ce{Cu + 4HNO3 (conc.) ->[\Delta] Cu(NO3)2 + 2H2O + 2NO2 ^}\]
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