Ammonia Cannot Be Dried By Bubbling Through Concentrated Sulphuric Acid

Ammonia cannot be dried by bubbling through concentrated sulphuric acid. Why ?

Answers:

Ammonia gas cannot be dried by bubbling through concentrated sulphuric acids as it reacts with sulphuric acid to form ammonium sulphate.
2NH₃ + H₂SO₄   →    (NH₄)₂SO₄