Question

A colourless pungent smelling has which easily liquidus to a colourless liquid and freezes to a white crystalline solid

Answer 1

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question will be

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.

answer

NaCl + H2SO4 (conc.)->  NaHSO4 + HCl