colourless pungent smelling gas, which easily liquefies to a colourless liquid and freezes to a white crystalline solid,

Monjur Alahi

A colourless pungent smelling gas, which easily liquefies to a colourless liquid and freezes to a white crystalline solid, gives dense white fumes
with ammonia. Identify the gas and write the chemical equation for its laboratory preparation.


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Salim Ahmed Kawsar

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[Hint : NaCl + H2SO4 (conc.)->  NaHSO4 + HCl]

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