A dilute aqueous solution of Na₂ SO₄ is electrolysed using platinum electrodes. The products at the anode and cathode are

The time required to liberate one gram equivalent of an element by passing one ampere current through its solution is

Which of the following solution has highest equivalent conductance ?

Which of the following expressions correctly represents the equivalent conductance at infinite dilution of Al₂ (SO₄)₃. Given that \({ \lambda }^{ ° }_{ Al^{ 3+ } }\) and \({ \lambda }^{ ° }_{ { SO_{ 4 } }^{ 2- } }\) are the equivalent conductances at infinite dilution of the respective ions?

Unit of ionic mobility is

Zinc dissolves in dilute acids to give Zn²⁺. The electrode potential of cell when it is coupled with SHE and acts as anode, is 0.76 V. What is the standard electrode potential of Zn²⁺ / Zn?

What products are obtained at cathode and anode when molten PbBr₂ is electrolysed?

What are the products obtained during electrolysis of CuSO₄ using Pt electrode?

Complete: \({ \Lambda }^{ o }{ Na }_{ 2 }{ SO }_{ 4 }=\)

Write the correct representation of cell: 2Cr(s)+3Cd²⁺ (aq) \(\rightarrow \) 2Cr³⁺(aq)+3Cd(s).

Can E^o_cell or \({ \triangle }_{ r }{ G }^{ o }\) for a cell reaction ever be equal to zero?

Under what condition os E_cell = 0 or \({ \triangle }_{ r }{ G }\) = 0?

What does the negative sign in expression E^o_Zn²⁺/Zn =-0.76 V mean?

The conductivity of 0.20 M KCl at 298 K is 0.025 S cm^-1. Calculate its molar conductivity.

How many faraday of charge is required for conversion of C₆H₅NO₂ into C₆H₅NH₂?

Explain why Zn dissolves in dil. HCl to liberate H₂(g) but from conc. H₂SO₄, the gas evolved is SO₂.

Calculate the time to deposit 1.27 g of copper at cathode when a current of 2 A was passed through the solution of CuSO₄ .

When a certain electrolytic cell was filled with 0.1 M KCl, it has resistance of 85 ohms at 25 ^oC. When the same cell was filled with an aqueous solution of 0.052 M unknown electrolyte, the resistance was 96 ohms. Calculate the molar conductance of the electrolyte at this concentration. [Specific conductance of 0.1 M KCl = \(1.29\times { 10 }^{ -2 }{ ohm }^{ -1 }{ cm }^{ -1 }\)]

A 100W and 110 V incandescent lamp is connected in series with an electrolytic cell containing CdSO₄  solution. What mass of cadmium will be deposited at the cathode after 4 hrs of electricity?

The standard electrode potentials of different electrodes are given as
E⁰ Co³⁺ /Co 2+ = 1.81 V, E⁰ Al 3+ /Al = -1.66 V, E⁰ Fe ²⁺ /Fe = -0.44 V, E⁰ _Br2/Br- = 1.01 V
a. Identify all the possible combination for construction of a feasible electrochemical cell?
b. Write their electrochemical cell representation.
c. Calculate the emf in each case.

Two students use same stock solution of ZnSO₄ and a solution of CuSO₄ . The e.m.f. of one cell is 0.03 V higher than the other. The concentration of CuSO₄ in the cell with higher e.m.f. value is 0.5 M. Find out the concentration of CuSO₄ in the other cell (2.303 RT/F = 0.06)