मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

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

Advertisements
Advertisements

प्रश्न

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

पर्याय

  • 1

  • 8

  • 12

  • 16

MCQ
Advertisements

उत्तर

12

  • The molecular mass of Hydrogen is 1 gram and has a single electron in its configuration as it is the first most element of the periodic table.
  • The 12 grams of Hydrogen contains 12 moles of the electrons in it. Usually, the electricity will be passed through the free electrons.
  • The 12 grams of Hydrogen contains 12 electrons which are free electrons.
  • Each free electron is capable of conducting 1 Faraday of electricity.
  • Since 12 grams of Hydrogen are having 12 electrons in it, we require 12 Faraday of electricity.
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2013-2014 (March)

APPEARS IN

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

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

  • 1
  • 2
  • 3
  • 4

The charge of how many coulomb is required to deposit 1.0 g of sodium metal (molar mass 23.0 g mol-1) from sodium ions is -

  1. 2098
  2. 96500
  3. 193000
  4. 4196

Write any four applications of electrochemical series


If a current of 0.5 ampere flows through a metallic wire for 2 hours, then how many electrons would flow through the wire?


Suggest a list of metals that are extracted electrolytically.


How much charge is required for the following reduction? 

1 mol of \[\ce{MnO^-_4}\] to Mn2+.


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 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


How many faradays of electricity are required to produce 13 gram of aluminium from aluminium chloride solution? (Given: Molar mass of Al = 27.0-gram mol–1)


Solve the following question.
A steady current of 2 amperes was passed through two electrolytic cells X and Y connected in series containing electrolytes FeSO4 and ZnSO4 until 2.8 g of Fe deposited at the cathode of cell X. How long did the current flow? Calculate the mass of Zn deposited at the cathode of cell Y.
(Molar mass : Fe = 56 g mol–1, Zn = 65.3 g mol–1, 1F = 96500 C mol–1)


According to Faraday’s First Law of Electrolysis, the amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the ____________.


In the electrolysis of aqueous sodium chloride solution which of the half cell reaction will occur at anode?


What will happen during the electrolysis of aqueous solution of \[\ce{CuSO4}\] by using platinum electrodes?

(i) Copper will deposit at cathode.

(ii) Copper will deposit at anode.

(iii) Oxygen will be released at anode.

(iv) Copper will dissolve at anode.


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.


Aqueous copper sulphate solution and aqueous silver nitrate solution are electrolysed by 1 ampere current for 10 minutes in separate electrolytic cells. Will the mass of copper and silver deposited on the cathode be same or different? Explain your answer.


Assertion: Electrolysis of NaCl solution gives chlorine at anode instead of O2.

Reason: Formation of oxygen at anode requires overvoltage.


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?


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 ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×