In a cell that utilizes the reaction
Zn(s) + 2H+ (aq) → Zn2+ (aq) + H2(g)
addition of H2SO4 to cathode compartment will
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For the reduction of silver ions with copper metal the standard cell potential was found to be +0.46 V at 25°C. The value of standard Gibbs energy, ΔG° will be (F = 96500 C mol–1) |
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In the electrolysis of acidulated water, it is desired to obtain 1.12 cc of hydrogen per second under S.T.P. conditions. The current to be passed is |
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The one which decreases with dilution is |
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Which of the following electrolytic solutions has the least specific conductance? |
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The standard electrode potential for the half cell reactions are Zn++ + 2e– → Zn, E° = – 0.76 V Fe++ + 2e– → Fe, E° = – 0.44 V The e.m.f. of the cell reaction Fe++ + Zn → Zn++ + Fe is |
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Which of the following is a redox reaction? |
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Given (i) Cu2+ + 2e– → Cu, E° = 0.337 V (ii) Cu2+ + e– → Cu+, E° = 0.153 V Electrode potential E° for the reaction Cu+ + e– → Cu will be |
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One faraday of electricity is passed separately through one litre of one molar aqueous solution of (i) AgNO3, (ii) SnCl4 and (iii) CuSO4. The number of moles of Ag, Sn and Cu deposited at cathode are respectively |
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Standard free energies of formation (in kJ/mol) at 298 K are –237.2, –394.4 and –8.2 for H2O(l), CO2(g) and pentane(g), respectively. The value of Eo |
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The standard reduction potentials of Zn2+ | Zn, Cu2+ | Cu and Ag+ | Ag are respectively –0.76, 0.34 and 0.8V. The following cells were constructed. a) Zn | Zn2+ || Cu2+ | Cu b) Zn | Zn2+ || Ag+ | Ag c) Cu | Cu2+ || Ag+ | Ag What is the correct order Eo |
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