Which of the following has highest electrode potential?

B e

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M g

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C a

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B a

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Solution

The correct option is A $B e$
Element : $B e$ $M g$ $C a$ $S r$ $B a$
Electrode potential : $- 1.70 - 2.37 - 2.87 - 2.89 - 2.90$

Be has the highest electrode potential as it is the least electropositive among the given metals.

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