Question

what happens when alkyl cyanides are completely hydrolysed in a presence of mineral acids​

Answer 1

☺For example, with ethanenitrile and hydrochloric acid you would get ethanoic acid and ammonium chloride.

☺Why is the free acid formed rather than the ammonium salt?

☺The ethanoate ions in the ammonium ethanoate react with hydrogen ions from the hydrochloric acid to produce ethanoic acid.