Q.

A standard hydrogen electrode has zero electrode potential because

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a

Hydrogen is easiest to oxidise

b

This electrode potential is assumed to be zero

c

Hydrogen atom has only one electron

d

Hydrogen is the lightest element

answer is B.

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Detailed Solution

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Standard hydrogen electrode is a reference electrode. Potential of any half cell is calculated with respect to standard hydrogen electrode (SHE). Hence, electrode potential of SHE has been arbitrarily assumed  to be zero.

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