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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Resistance of 0.2 M solution of an electrolyte is 50 Ω. The specific conductance of the solution is 1.3 S m–1. If resistance of the 0.4 M solution of the same electrolyte is 260 Ω, its molar conductivity is |
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E1, E2 and E3 are the emf values of the three galvanic cells respectively. (a) Zn | Zn+2 (b) Zn | Zn+2 (c) Zn | Zn+2 Which one of the following is true? |
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Which among the following metals is employed to provide cathodic protection to iron? |
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