In which of the following reactions does hydrogen acts as an oxidisng

1.	In which of the following reactions does hydrogen acts as an oxidisng agent?
Answer» `H_(2)+Na rarr` `CH_(2)=CH_(2)+H_(2) rarr` `PbO_(2)+H_(2)` `F_(2)+H_(2) rarr` Solution :Oxidation state of hydrogen changes from 0 to -1. Thus, it acts as an oxidising agent `2Na+H_(2)^(0) rarr 2overset(+)(N)AOVERSET(-)(H)`

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