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04/10/2020 11:27 am
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A 1.0 M with respect to each of the metal halides AX3, BX2, CX3 and DX2 is electrolysed using platinum electrodes. If
E°A3+/A = 1.50 V, E°B2+/B = 0.3 V,
E°C3+/C = -0.74 V, E°D2+/D = -2.37 V
The correct sequence in which the various metals are deposited at the cathode is
(a) A, B, C, D
(b) A, B, C
(c) D, C, B, A
(d) C, B, A
1 Answer
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04/10/2020 11:28 am
(b) A, B, C
Explanation:
The more the reduction potential, the more is the deposition of metals at cathode. Cation having E° value less than -0.83 V (reduction potential of H2O) will not deposit from aqueous solution.