हिंदी

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:

विकल्प

  • 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
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2013-2014 (March)

APPEARS IN

वीडियो 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

96500 coulombs correspond to the charge on how many electrons?


How much electricity in terms of Faraday is required to produce 20 g of Ca from molten CaCl2?

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


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


Consider the reaction:

\[\ce{Cr2O^{2-}_7 + 14H+ + 6e- -> 2Cr^{3+} + 7H2O}\]

What is the quantity of electricity in coulombs needed to reduce 1 mol of  \[\ce{Cr2O^{2-}_7}\]?


How much charge is required for the following reduction? 

1 mol of Cu2+ to Cu.


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


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?


On passing 1.5 F charge, the number of moles of aluminium deposited at cathode are _______ [Molar mass of Al = 27 gram mol–1]

(A) 1.0

(B) 13.5

(C) 0.50

(D) 0.75


Write any two uses of H2SO4


State second law of electrolysis


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)


 Following reactions occur at cathode during the electrolysis of aqueous copper(II) chloride solution :

On the basis of their standard reduction electrode potential (E°) values, which reaction is feasible at the cathode and why ?


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)


Electrolytic cell uses electrical energy to bring about ____________.


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.


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.


When during electrolysis of a solution of AgNO3, 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposited on the cathode will be ______.


Given `1/a` = 0.5 CM–1, R = 50 ohm, N = 1.0 then equivalent conductance of electrolytic cell is


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


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×