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

Options

1. ANaH; NaH + H 2 O → NaOH + H 2 ; At the anode, hydrogen gas will be evolved.
2. BNa 2 H; Na 2 H + H 2 O → 2NaOH + H 2 ; At the anode, sodium metal will be formed.
3. CNaH 2 ; NaH 2 + H 2 O → NaOH + H 2 ; At the anode, oxygen gas will be evolved.
4. DNa 2 H 2 ; Na 2 H 2 + H 2 O → 2NaOH + H 2 ; At the anode, sodium metal will be formed.