Answer:
Hydrogen has the following
advantages over conventional fuels such as coal, kerosene, petrol etc.
(i) Its combustion is always complete
and there are no unburnt particles. Thus, it can solve all pollution problems which
are major threat to modem civilisation.
(ii) Hydrogen has more calorific
value than petrol and other fuels. For example, 9.5 kg of liquid hydrogen can
evolve as much energy on combustion as 25 kg of petrol.
(iii) In space rockets, liquid hydrogen
gives higher upward thrust as compared to other fuels.
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