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प्रश्न
Name the drying agents phosphorus pentoxide and calcium oxide are good drying agent but they cannot be used to dry hydrogen chloride gas. Why?
उत्तर
Phosphorous pentoxide and CaO cannot be used to dry HCl because they react with HCl.
2P2O5+ 3HCl → POCl3 + 3HPO3
CaO + 2HCl → CaCl2 + H2O
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Laboratory Preparation of Hydrogen Chloride Gas
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