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  4. Standard reduction electrode potential of three metals A, B and C are respectively + 0.05 V, - 3.0 V and -1 .2 V. The reducing powers of

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Q. Standard reduction electrode potential of three metals A, B and C are respectively + 0.05 V, - 3.0 V and -1 .2 V. The reducing powers of

Electrochemistry

Solution:

Higher the $R.P.$, easier to reduce hence better $O. A.$ Thus species with higher reducing power (better $R.A$.) has a lower $R.P$. Therefore, correct order of reducing power is
$B > C > A$