Free NCERT Solutions For Class 12 Chemistry Chapter 3 : Electrochemistry Free PDF Download
How would you determine the standard electrode potential of the system Mg2+1 Mg?
Can you store copper sulphate solutions in a zinc pot?
Consult the table of standard electrode potentials and suggest three substances that can oxidize ferrous ions under suitable conditions.
Calculate the potential of hydrogen electrode in contact with a solution whose pH is 10.
Why does the conductivity of solution decrease with dilution?
If a current of 0.5 ampere flows through a metallic wire for 2 hours, then how many electrons would flow through the wire?
Write the chemistry of recharging the lead storage battery, highlighting all the materials that are involved during recharging.
Explain how rusting of iron is envisaged as setting up of an electro chemical cell
Arrange the following metals in the order in which they displace each other from the solution of their salts: Al, Cu, Fe, Mg and Zn
Calculate the standard cell potentials of galvanic cell in which the following reactions take place
In the button cells widely used in watches and other devices the following reaction takes places:
Define conductivity and molar conductivity for the solution of an electrolyte. Discuss their variation with concentration.
The conductivity of 0.20 M solution of KCl at 298 K is 0.0248 S cm-1 . Calculate its molar conductivity.
How much electricity in terms of Faraday is required to produce.
(i) 20.0 g of Ca from molten CaCl2?
(ii) 40.0 g of Al from molten Al2O3?
How much electricity is required in coulomb for the oxidation of
(i) 1 mol of H2O to O2
(ii) 1 mol of FeO to Fe2O3
Three electrolytic cells, A, B, C containing solutions of ZnSO4, AgNO3 and CuSO4 , respectively are connected in series. A steady current of 1.5 amperes was passed through them until 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?
Predict the products of electrolysis in each of the following .
(i) An aqueous solution of AgNO3 with silver electrodes.
(ii) An aqueous solution of AgNO3 With platinum electrodes.
(iii) A dilute solution of H2SO4 with platinum electrodes.
(iv) An aqueous solution of CuCl2 with platinum electrodes.