Multiple choice Which is an acid salt? (NH4)2Ni(SO4)2.6H2O Na2CO3 KHSO4 None of these Reveal answer Fill a bubble to check yourself C Correct answer Explanation An acid salt is derived from an acid and base in which only a part of the hydrogen is replaced by a basic radical.In KHSO4 only one H of Sulphuric acid has been replaced by K+ of KOH. Hence, it is an acid salt.