Drying agents like calcium oxide and phosphorus pentoxide are not used for drying hydrogen chloride gas. Give reasons for each.

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Solution

Drying agents like calcium oxide and phosphorus pentoxide are not used for drying hydrogen chloride gas because they react with the gas.
$C a O + 2 H C l \to C a C l_{2} + H_{2} O$
$2 P_{2} O_{5} + 3 H C l \to P O C l_{3} + 3 H P O_{3}$

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Q. Drying agents like calcium oxide and phosphorus pentoxide are not used for drying hydrogen chloride gas. Give reasons for each. [2 MARKS]

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Drying agents like calcium oxide and phosphorus pentoxide are not used for drying hydrogen chloride gas. Give reasons for each.

Drying agents like calcium oxide and phosphorus pentoxide are not used for drying hydrogen chloride gas because they react with the gas. CaO+2HCl→CaCl2+H2O 2P2O5+3HCl→POCl3+3HPO3

Drying agents like calcium oxide and phosphorus pentoxide are not used for drying hydrogen chloride gas because they react with the gas.
$C a O + 2 H C l \to C a C l_{2} + H_{2} O$
$2 P_{2} O_{5} + 3 H C l \to P O C l_{3} + 3 H P O_{3}$