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प्रश्न
How is nitric acid prepared in laboratory?
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उत्तर
In laboratory, nitric acid is prepared by heating a mixture of concentrated sulphuric acid and potassium or sodium nitrate with Conc. H2SO4 at 200°C.
\[\ce{KNO3 + H2SO4 -> KHSO4 + HNO3}\]
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