Standard electrode potentials are:
Fe2+ | Fe (E° = –0.44 V), Fe3+ | Fe2+ (E° =0.77 V)
Fe2+, Fe3+ and Fe blocks are kept together, then
Standard electrode potentials are:
Fe2+ | Fe (E° = –0.44 V), Fe3+ | Fe2+ (E° =0.77 V)
Fe2+, Fe3+ and Fe blocks are kept together, then
The best way to prevent rusting of iron is |
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The laws of electrolysis were proposed by |
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The electrochemical equivalent of a metal is ‘$x$’ gram–coulomb–1. The equivalent weight of metal is |
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20 ml solution of 0.1 M ferrous sulphate was completely oxidised using a suitable oxidising agent. What is the number of electrons exchanged? |
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The process of zinc–plating on iron sheet is known as |
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The logarithm of the equilibrium constant of the cell reaction corresponding to the cell X(s) | X2+(aq) || Y+(aq) | Y(s) with standard cell potential, Eo |
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The pH of aqueous KCl solution is 7.0. This solution was electrolyzed for a few seconds using Pt electrodes. Which of the following is correct? |
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The standard EMF of Daniell cell is 1.10 volt. The maximum electrical work obtained from the Daniell cell is |
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The standard potentials at 25°C for the half reactions are given against them below. Zn2++ 2e– → Zn; E° = –0.762 V Mg2++ 2e– →Mg E° = –2.37 V When Zinc dust is added to MgCl2 solution |
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On the basis of information available for the reaction: $\dfrac{4}{3}$Al + O2 → 2Al2O3; ΔG = –827 kJ mol–1 of O2. The minimum e.m.f. required to carry out the electrolysis of Al2O3 is (F = 96500 C mol–1) |
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