chemistry 12th class cbse notes

Preparation of Hydrogen Chloride:

It is prepared by heating sodium chloride with concentrated sulphuric acid.

Preparation of Hydrogen Chloride

Properties of Hydrogen Chloride:

  • HCl is a colourless gas with a pungent odour.
  • It is extremely soluble in water
  • It decomposes salts of weaker acids.
  • It has a pungent suffocating smell.
  • The gas fumes in moist air.
  • It is heavier than air (vapour density is 18.25). it is easily liquefied to a colourless liquid (b.p. 189 K) and freezes to a white crystalline solid (f.p. 159 K).
  • Its b.p is 189 K and m.p. is 159 K.

Uses of Hydrogen Chloride:

  • Hydrogen chloride is used in medicine and as a laboratory reagent.
  • It is used in the manufacture of chlorine, NH4Cl and glucose.


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