NH_(4)CI +Na_(2)HPO_(4)+4Z rarr underset(("sparingly soluble salt"))(A)+ NaCI A overset(Delta)rarr A' +4Z A' overset(Delta)underset("High" T)rarr X+Y uarr +Z Compound (Z) is a neutral oxide and turns anhydrous CuSO_(4) blue. Gas (Y) is a basic gas which can also be obtained by treating ammonium sulphate with lime water. sequences mentioned above involve balanced reactions. The compound X is:

NH_(4)CI +Na_(2)HPO_(4)+4Z rarr underset(("sparingly soluble salt"))(A

1.	NH_(4)CI +Na_(2)HPO_(4)+4Z rarr underset(("sparingly soluble salt"))(A)+ NaCI A overset(Delta)rarr A' +4Z A' overset(Delta)underset("High" T)rarr X+Y uarr +Z Compound (Z) is a neutral oxide and turns anhydrous CuSO_(4) blue. Gas (Y) is a basic gas which can also be obtained by treating ammonium sulphate with lime water. sequences mentioned above involve balanced reactions. The compound X is:
Answer» `NaHPO_(4)` `Na_(3)PO_(3)` `NaPO_(3)` `Na_(3)PO_(4)` Solution :`Z rarr H_(2)O, A rarr NA(NH_(4))HPO_(4).4H_(2)O, X rarr NaPO_(3)` `Y rarr NH_(3),A' rarr Na(NH)_(4)HPO_(4)`