The isotopes of hydrogen and their mass ratio are -

1. Protium, Deuterium, Tritium ; 3:2:3

2. Protium, Deuterium, Tritium ; 1:2:3

3. Protium, Deuterium, Tritium ; 2:2:3

4. Protium, Deuterium, Tritium ; 3:2:1

Subtopic:  Hydrogen- Types & Isotopes |
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Hydrogen exists in diatomic form rather than monoatomic form under normal conditions -

1. Due to high ionization enthalpy

2. Due to low ionization enthalpy

3. Due to high electron gain enthalpy

4. Due to low electron gain enthalpy

Subtopic:  Hydrogen- Types & Isotopes |
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The consequences of high enthalpy of H–H bond in dihydrogen is /are -

1. Hydrogen has a low tendency to form H+ions.

2. It forms diatomic molecules (H2), and a large number of covalent hydrides.

3. Hydrogen does not possess metallic characteristics.

4. All of the above.

Subtopic:  Hydrogen- Types & Isotopes |
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The catalyst used to increase the production of H, by ‘coal gasification' process is -

1. Copper 

2. FeCr2O4 (iron chromate) 

3. Pd/C 

4. None of the above.

Subtopic:  Hydrogen- Types & Isotopes |
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Hydrogen is placed separately in the periodic table because : 

1. It resembles alkali metals.

2. It shows the same reactions as halogens.

3. Both (1) and (2)

4. None of the above.

Subtopic:  Hydrogen- Types & Isotopes |
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