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प्रश्न
What is the action of conc. sulphuric acid on potassium nitrate?
लघु उत्तरीय
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उत्तर
When solid potassium nitrate (KNO3) is heated with concentrated sulphuric acid below 200°C, it forms potassium hydrogen sulphate and evolves volatile nitric acid (HNO3) vapours.
\[\ce{KNO3 + H2SO4 (conc.) ->[< 200°C] KHSO4 + HNO3 ^}\]
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