A molten ionic hydride on electrolysis gives:

1. H⁺ ion moving towards the cathode.

2. H⁺ ion moving towards the anode.

3. H₂ is liberated at anode.

4. H₂ is liberated at cathode.

In solid hydrogen, the intermolecular bonding is:

1. ionic

2. van der Waals'

3. metallic

4. covalent

Hydrogen combines directly with:

1. Ca

2. Cu

3. Zn

4. Fe

Ionic hydrides react with water to give:

1. Acidic solutions.

2. Basic solutions.

3. Hydride ion.

4. Protons.

A neutral hydride among the following is -

1. H₂S

2. H₂O

3. H₂Se

4. H₂Te