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प्रश्न
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.
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उत्तर
The dry cell (also known as Leclanche cell) is used in transistors.
The reactions taking place at the anode and cathode are given below.
At anode: Zn(s) → Zn2+ + 2e−
At cathode : `MnO_2 + NH_4^+ + e^(-) -> MnO(OH) + NH_3`
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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?
How much charge is required for the following reduction?
1 mol of Al3+ to Al.
How much charge is required for the following reduction?
1 mol of Cu2+ to Cu.
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
Draw neat labelled diagram of electrolytic refining of blister copper
Electrolytic cell uses electrical energy to bring about ____________.
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 ______.
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).
