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

Which of the following solution has highest equivalent conductance ?

A hypothetical electrochemical cell is\(\overset { \circleddash }{ A } |{ A }^{ + }\left( xM \right) \parallel { { B }^{ + } }\left( yM \right) |\overset { \oplus }{ B } \) The emf measured is + 0.20 V. The cell reaction is  

A gas X at 1 atm is bubbled through a solution containing a mixture of 1M Y^- and 1M Z^- ions at 25°C . If the reduction potential of Z > Y > X, then

If Zn²⁺ / Zn electrode is diluted 100 times, then the change in emf is

How will pH of brine (aq.NaCl solution) be affected when it is electrolysed?

Zinc rod is dipped in 0.1 M solution of ZnSO₄. The salt is 95% dissociated at this dilution at 298 K. Calculate the electrode potential.
Given E^o_Zn²⁺/Zn = -0.76 V

Consult the table of standard electrode potentials and suggest three substances that can oxidize ferrous ions under suitable conditions.

How much amount of a substance is deposited by 1 coulomb ? What is it called ?

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 = \(1.29\times { 10 }^{ -2 }{ ohm }^{ -1 }{ cm }^{ -1 }\)]

For the cell
\(Zn(s)\left| { Zn }^{ 2+ }(2M) \right| \left| { Cu }^{ 2+ }(0.5M) \right| Cu(s)\)
(a) Write equation for each half-reaction.
(b) Calculate the cell potential at 25 ^oC.
[Given: \({ E }_{ { Zn }^{ 2+ }/Zn }^{ o }=-0.76V;{ E }_{ { Cu }^{ 2+ }/Cu }^{ o }=+0.34V\)]

Three electrolytic cells A, B, C containing solutions of ZnSO₄, AgNO_3, and CuSO₄, respectively are connected in series. A steady current of 1.5 amperes was passed through them until 1.45 g of silver deposited at the cathode of cell B. How long did the current flow? What mass of copper and zinc were deposited?