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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

State Second Law of Electrolysis - Chemistry

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प्रश्न

State second law of electrolysis

State Faraday’s second law of electrolysis

उत्तर

Second law : It states that when the same amount of electricity is passed through different cells containing different electrolytes and arranged in series, the amount of substances oxidized or reduced at the representive electrode are directly proportional to their chemical equavalent masses

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2013-2014 (March)

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संबंधित प्रश्‍न

On calculating the strength of current in amperes if a charge of 840C (coulomb) passes through an electrolyte in 7 minutes, it will be

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  • 4

96500 coulombs correspond to the charge on how many electrons?


Write any four applications of electrochemical series


How much electricity in terms of Faraday is required to produce 20 g of \[\ce{Ca}\] from molten \[\ce{CaCl2}\]?

(Given: Molar mass of Calcium is 40 g mol−1.)


State the first law of electrolysis


Number of faradays of electricity required to liberate 12 g of hydrogen is:


How much charge is required for the following reduction:

1 mol of \[\ce{MnO^-_4}\] to \[\ce{Mn^{2+}}\]?


A solution of \[\ce{Ni(NO3)2}\] is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of \[\ce{Ni}\] is deposited at the cathode?


Three electrolytic cells A, B, C containing solutions of \[\ce{ZnSO4}\], \[\ce{AgNO3}\] and \[\ce{CuSO4}\], 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?


Draw neat labelled diagram of electrolytic refining of blister copper


What is the ratio of volumes of H2 and O2 liberated during electrolysis of acidified water?

(A) 1 : 2

(B) 2 : 1

(C) 1 : 8

(D) 8 : 1


Explain Faraday’s second law of electrolysis


Write the name of the cell which is generally used in transistors. Write the reactions taking place at the anode and the cathode of this cell.


How much quantity of electricity in coulomb is required to deposit 1.346 × 10-3 kg of Ag in 3.5 minutes from AgNO3 solution?
( Given: Molar mass of Ag is 108 × 10-3 kg mol-1 )


What will happen during the electrolysis of aqueous solution of CuSO4 in the presence of Cu electrodes?

(i) Copper will deposit at cathode.

(ii) Copper will dissolve at anode.

(iii) Oxygen will be released at anode.

(iv) Copper will deposit at anode.


Consider the figure and answer the following question.

Cell ‘A’ has ECell = 2V and Cell ‘B’ has ECell = 1.1V which of the two cells ‘A’ or ‘B’ will act as an electrolytic cell. Which electrode reactions will occur in this cell?


When during electrolysis of a solution of Ag No3, 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposite on the cathode will be:-


On Electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained at the anode will be.


What is the quantity of electricity in Coulombs required to produce 4.8 g of Mg from molten MgCl2? How much Ca will be produced if the same amount of electricity was passed through molten CaCl2? (Atomic mass of Mg = 24 u, atomic mass of Ca = 40 u).


Through an aqueous solution of an unknown salt of metal M (M = 200 g/mol) a current of 1.93 A is passed for 50 min. If 4 g of metal is produced at cathode. The charge on metal ion in solution is ______.


A current of 4 amp was passed for 2 hours through a solution of copper sulphate when 5.0 g of copper was deposited. The current efficiency is ______% (Cu = 63.5).


On passing electricity through nitrobenzene solution, it is converted into azobenzene. The mass of azobenzene is ______ mg, if the same quantity of electricity produces oxygen just sufficient to burn 96 mg of fullerene (C60


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