`MgN_(2)` when reacted with water gives `NH_(3)` and HCl. However, `MgCl_(2)` does not give HCl when treated with water at room temperature. Assigne reason.

Explanation

`Mg_(3)N_(2)` is a salt of a strong base `Mg(OH)_(2)` and a weak acid `NH_(3)` . Therefore , it undergoes hydrolysis to give `NH_(3)` .
`Mg_(3) N_(2) + 6H_(2) O to 3 Mg(OH)_(2) + 2NH_(3)`
In contrast , `MgCl_(2)` is a salt of a strong base `Mg(OH)_(2)` and a strong acid HCl . Therefore , it does not undergo hydrolysis to give HCl .
`MgCl_(2) + 2 H_(2)O cancelto Mg (OH)_(2) + 2 HCl`