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Using H 2 as a fuel has two major advantages: (i) Heat of combustion of H 2 is by far the largest, i.e. 115 megajoules per kilogram (MJ/kg): (ii) Exhaust is free from pollutants. The most effective means of storing hydrogen is in the liquid form. The liquid H 2 is widely used as a rocket fuel since it gives higher thrusts than most of the other fuels. The range of supersonic aircraft could be increased if the aircraft used liquid H 2 as a fuel. Further hypersonic aircraft would also become possible if liquid H 2 is used as a fuel.

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Hydrogen

Short Answer Type

101. Arrange the following:
LiH, NaH and CsH in order of increasing ionic character.

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102. Arrange the following:
H–H, D–D and F–F in order of increasing bond dissociation enthalpy.

859 Views

103. Arrange the following:

NaH, MgH₂ and H₂O in order of increasing reducing property.

1268 Views

Long Answer Type

104.

Describe the industrial uses of hydrogen which depend on:
(i) the heat liberated when it burns,
(ii) its ability to react with vegetable oil in the presence of catalyst,
(iii) its ability to unite with nitrogen.

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Short Answer Type

105. How does the atomic hydrogen or oxy-hydrogen torch function for cutting and welding purposes? Explain.

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106.

Mention some important uses of dihydrogen ?

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Long Answer Type

107. What is understood by ‘Hydrogen economy.’

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Short Answer Type

108.

How do you expect the metallic hydrides to be useful for hydrogen storage? Explain.

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109.
Give reason for the fact that liquid hydrogen is used as a fuel.

Using H₂ as a fuel has two major advantages:
(i) Heat of combustion of H₂ is by far the largest, i.e. 115 megajoules per kilogram (MJ/kg):
(ii) Exhaust is free from pollutants.
The most effective means of storing hydrogen is in the liquid form. The liquid H₂ is widely used as a rocket fuel since it gives higher thrusts than most of the other fuels. The range of supersonic aircraft could be increased if the aircraft used liquid H₂ as a fuel. Further hypersonic aircraft would also become possible if liquid H₂ is used as a fuel.

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