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प्रश्न
Number of faradays of electricity required to liberate 12 g of hydrogen is:
विकल्प
1
8
12
16
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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.
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संबंधित प्रश्न
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 -
- 2098
- 96500
- 193000
- 4196
Following reactions occur at cathode during the electrolysis of aqueous sodium chloride solution:
Na+(aq) + e− ⟶ Na (s) E0 = 2.71 V
H+(aq) + e− ⟶ `1/2` H2 (g) E0 = 0.00 V
On the basis of their standard reduction electrode potential (E0) values, which reaction is feasible at the cathode and why?
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1 mol of Al3+ to Al?
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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?
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(A) 1.0
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(C) 0.50
(D) 0.75
Write any two uses of H2SO4
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(A) 1 : 2
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(C) 1 : 8
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Solve the following question.
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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?
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Select the most appropriate answer from the options given below:
How much electricity in terms of Faraday is required to produce 40.0 g of Al from molten Al2O3?
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