1.

Which of the following can produce hydrogen from water ?

Answer»

Heated stannic oxide
Heated iron
Heated aluminium oxide
Heated copper oxide

Solution :Generally heated oxides do not react with `H_(2)O` to EVOLVE `H_(2)` GAS. Only iron REACTS.
`3Fe+4H_(2)O ("hot")toFe_(3)O_(4)+4H_(2)`


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