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प्रश्न
Copper metal on treatment with conc. nitric acid (HNO3) gives ______.
विकल्प
Cu(NO3)2 + CuO + H2O
Cu(NO3)2 + NO + H2O
Cu(NO3)2 + NO2 + H2O
Cu(NO3)2 + H2SO4 + H2O
MCQ
रिक्त स्थान भरें
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उत्तर
Copper metal on treatment with conc. nitric acid (HNO3) gives Cu(NO3)2 + CuO + H2O.
Explanation:
When concentrated nitric acid reacts with copper, it acts as a strong oxidising agent.
Copper is oxidised to copper(II) nitrate, while nitric acid is reduced to nitrogen dioxide (NO2), a brown gas.
\[\ce{Cu + 4HNO3 -> Cu(NO3)2 + 2NO2 + 2H2O}\]
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