When electric current is passed through an ionic hydride in molten state:

Options

A. hydrogen is liberated at anode
B. hydrogen is liberated at cathode
C. hydride ion migrates towards cathode
D. hydride ion remains in solution

Explanation

To solve the question regarding what happens when electric current is passed through an ionic hydride in molten state, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Ionic Hydrides**:
- Ionic hydrides are compounds formed between hydrogen and metals, where hydrogen exists as an anion (H⁻). In the molten state, these ions are free to move.

2. **Identify the Electrolysis Process**:
- When electric current is passed through a molten ionic compound, electrolysis occurs. This involves the movement of ions towards the electrodes.

3. **Determine the Movement of Ions**:
- In the case of an ionic hydride, the H⁻ ions will migrate towards the anode (positive electrode) because they are negatively charged.

4. **Electrochemical Reactions at the Electrodes**:
- At the anode, oxidation occurs. The H⁻ ions lose electrons to form hydrogen gas (H₂). The reaction can be represented as:
\[ 2H^- \rightarrow H_2 + 2e^- \]
- This shows that hydrogen gas is produced at the anode.

5. **Conclusion**:
- Based on the electrolysis of the ionic hydride, we conclude that when electric current is passed through an ionic hydride in molten state, hydrogen is liberated at the anode.

### Final Answer:
- The correct option is: **A) Hydrogen is liberated at anode.**