Sodium forms a crystallisation ionic solid with dihydrogen. The solid is non-conducting in nature. It reacts violently with water to produce dihydrogen gas. Write the formula of this compond and its reaction with water. What will happen on electrolysis of the melt of this solid.

Explanation

The available information suggests the cyrstalline solid is sodium hydride (NaH), It is nont volatile due to its crystalline nature and does not conduct electricity in the solid state.
`NaH(s)+H_(2)O(aq) to NaOH(aq)+H_(2)(g)`
Upon electrolysis , the melt (molten metal hydride) will conduct electricity.
`underset("Melt")(NaH(l)) overset("Electrolysis")to underset("Cathode")(Na^(+))+underset("anode")(H^(-))`
At cathode: `Na^(+)+e^(-) to Na, "At anode": H^(-) overset(-e)to H or 1//2 H_(2)`.