Which of the following compound is used to dry the highly water-soluble compound – Hydrogen chloride (HCl) gas. 1.Quicklime. 2.Conc. sulphuric acid. 3.Phosphorous pentoxide. 4.Anhydrous calcium chloride.

Home » Which of the following compound is used to dry the highly water-soluble compound – Hydrogen chloride (HCl) gas. 1.Quicklime. 2.Conc. sulphuric acid. 3.Phosphorous pentoxide. 4.Anhydrous calcium chloride.

Chemistry | Class 10 | ICSE | Selina | Study of Compounds – Hydrogen Chloride

Which of the following compound is used to dry the highly water-soluble compound – Hydrogen chloride (HCl) gas. 1.Quicklime. 2.Conc. sulphuric acid. 3.Phosphorous pentoxide. 4.Anhydrous calcium chloride.

Solution: Conc. sulphuric acid.

HCl is dried by passing through concentrated sulphuric acid.
HCl gas can’t be dried using drying agents like P₂O₅ and CaO and since they react with HCl.

2P₂O₅+3HCl→POCl₃+3HPO₃
CaO+HCl→CaCl₂+H₂O

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