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Question

Which of the following is the laboratory preparation of dihydrogen?

A
3Fe+4H2O (steam)Fe3O4+4H2
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B
2Na+2H2O2NaOH+H2
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C
CaH2+2H2OCa(OH)2+2H2
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D
Zn+HCl (dil.)ZnCl2+H2
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