3. 1.Hydrogen is a colourless $ odourless
gas. It is highly combustible $a source of
energy.
2.In normal state hydrogen is lightest of
all gas.
4. Hydrogen is very stable in normal condition , it is
undergoes various reaction at elevated
temperature . When it mixed with Oxygen it
gives 29,000 calories per gram ,but in coal gives
7800 calorie per gram energy.
5. Breaking down the hydrocarbon (mainly
methane)
Electrolysis from water.
By reacting water of metals.
6. Bio-photolysis – The production of hydrogen from
water with the help of sunlight .
7. Hydrogen is colourless & odourless and non
polluting , yielding pure water vapour as
exhaust when combusted in air .
Hydrogen is the lightest chemical element and
has the best energy to weight ratio of any fuel.
Hydrogen can be produced anywhere , it can
be produced domestically from the
decomposition of water .
8. Hydrogen is difficult to handle , store , and
transport .it requires heavy , cumbersome tanks
when stored the gas .
It is impossible to obtain hydrogen gas without
expanding energy in the process.
Other than some volcanic emanations ,
hydrogen does not exist in it pure form in
environment .
