The standard reduction potential of Hydrogen is zero because
it is taken as standard reference
its is the easiest to oxidize
it has a single electron
it is electronegetive
As we have learnt,
Standard reduction potential -
It measure the tendency of a chemical species to acquire electrons and there by be reduced. It is measured in volts or mv.
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Absolute electric potential for an electrode cannot be measure without forming a cell. Therefore hydrogen is taken as standard reference and its potential is taken as zero.
Option 1)
it is taken as standard reference
Option 2)
its is the easiest to oxidize
Option 3)
it has a single electron
Option 4)
it is electronegetive
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