Question

which gas is evolved when ammonium chloride is added to water

Answer 1

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Answer :- HCL gas is evolved.

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Answer 2

The reaction is called hydrolysis. the resulting compound is very much water soluble and so ammonium chloride will dissolve in it.

There is no gas evolution in this process, though the react. Two products are formed namely : HCl and NH4OH.

The reaction however can make the water a bit acidic.