20 ml solution of 0.1 M ferrous sulphate was completely oxidised using a suitable oxidising agent. What is the number of electrons exchanged?
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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The standard reduction potential for Cu2+/Cu; Zn2+/Zn; Li+/Li; Ag+/Ag and H+/H2 are 0.34 V, –0.762 V, –3.05 V, + 0.80 V and 0.00 V respectively. Choose the strongest reducing agent among the following. |
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The standard reduction potentials of Ag, Cu, Co and Zn are 0.799, 0.337, –0.277 and –0.762 V respectively. Which of the following cells will have maximum cell e.m.f.? |
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The Eo |
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The oxidation state of chromium in the final product formed by the reaction between Kl and acidified potassium dichromate solution is |
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