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The standard electrode potentials E^{0} _{\mathrm{\left(M^{+} / M\right)}}  of four metals A, B, C, D are 4.8V, 2.6V, 3.9V and -0.23V. The sequence of deposition of metals on applying potential is

Option: 1

\mathrm{ B>C>D>A }


Option: 2

\mathrm{ A>B>C>D }


Option: 3

\mathrm{A>C>B>D }


Option: 4

\mathrm{ D>A>B>C}


Answers (1)

best_answer

An complete cation electrolysis at cathode the species having higher reduction potential is preferably reduced at cathode.

\mathrm{E_A^0>E_C^0>E^{0}_B>E^{0}_D }
Hence; \mathrm{A>C>B>D} will preferred as deposition of these metals on competing.

Posted by

Pankaj Sanodiya

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