Chemistry
Starting from hydrogen gas how would you obtain
(a) A neutral liquid
(b) A basic gas
(c) A metal by reduction of its heated oxide.
[the metal formed is above iron in the activity series]
Hydrogen
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Answer
(a) Hydrogen burns quietly in oxygen with a pale blue flame and water is formed.
2H2 + O2 ⟶ 2H2O
(b) Three volumes of hydrogen, reacts with one volume of nitrogen to form ammonia which is a basic gas.
(c) Hydrogen reduces oxides of less active metals e.g. zinc to form the reduced metal & water.
ZnO + H2 ⟶ Zn + H2O
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