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. No change takes place
D. Hydride ion migrates towards cathode

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. **Understanding Ionic Hydrides**: Ionic hydrides are compounds formed between hydrogen and metals, where hydrogen exists as a hydride ion (H⁻). In the molten state, these ions are free to move.

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

3. **Identifying the Electrodes**: In electrolysis, the anode is the positive electrode where oxidation occurs, and the cathode is the negative electrode where reduction takes place.

4. **Behavior of Hydride Ion (H⁻)**: The hydride ion (H⁻) will migrate towards the anode because it is negatively charged. At the anode, it undergoes oxidation.

5. **Oxidation Reaction**: The oxidation of the hydride ion can be represented by the following half-reaction:
\[ 2H⁻ \rightarrow H₂ + 2e⁻ \]
This means that two hydride ions lose electrons to form hydrogen gas (H₂).

6. **Conclusion**: Since oxidation occurs at the anode, hydrogen gas is liberated at the anode during the electrolysis of the ionic hydride.

7. **Final Answer**: Therefore, the correct answer to the question is that hydrogen is liberated at the anode.