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Hydrogen gas which is easily available o...

Hydrogen gas which is easily available on the earth is going to be the next promising fuel ' -discuss.

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(i) Calorific value of hydrogen gas. Advantage and disadvanteges of hydrogen gas as a fuel.
(ii) Find the calorific value of hydrogen as a fuel. Find the pollutants released due to the combustion of hydrogen. Is stream (water vapour) a toxic substance ? can a technology in whic hydrogen is used as fuel be developed ? is it already in use ? how are rockets sent into outer space ?
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