The most abundant isotope of hydrogen is-

1. Tritium

2. Deuterium

3. Protium

4. Para-hydrogen

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.

10 volumes of H₂O₂ has a strength of approximately:

1. 3%

2. 30%

3. 10%

4. 5%

OXIDISINThe incorrect statement among the following regarding H₂O₂  is -

1. It can only act as an oxidising agent

2. It decomposes on exposure to light

3. It has to be stored in plastic or wax-lined glass bottles in dark

4. It has to be kept away from dust

An industrial method of preparation of Hydrogen peroxide is -

1. Action of H₂SO₄ on barium peroxide

2. Action of H₂SO₄ on sodium peroxide

3. Auto-oxidation of 2-alkylanthraquinols.

4. Burning hydrogen in excess of oxygen

Ionic hydrides are formed by:

1. Transition metals.

2. Elements of very high electropositivity.

3. Elements of very low electropositivity.

4. Metalloids.

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

When zeolites (hydrated sodium aluminum silicate) is treated with hard water, the sodium ions are exchanged with:

1. H⁺ ion

2. Ca²⁺ ion

3. ${\mathrm{SO}}_4^{2-}$ ion

4. OH^- ion