Question

Compare the combustibility of –

(i) pure hydrogen

(ii) hydrogen-air mixture​

Answer 1

Answer:

Hydrogen needs air to react (according to 2H2 + 02 -> 2H20) so technically 'pure' hydrogen gas is not flammable. You need a mixture of both H2 and 02 to get a reaction, so by definition, a mixture of hydrogen gas and air is more flammable.

Answer 2

Answer:

Combustibility of

i) Pure hydrogen: Burns quietly in air with a pale blue flame forming water.2H2 + O2–> 2H2O

ii) Hydrogen-air mixture: Burns with a characteristic 'pop sound'.

Explanation:

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