Advertisements
Advertisements
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.
Advertisements
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`
APPEARS IN
संबंधित प्रश्न
96500 coulombs correspond to the charge on how many electrons?
Number of faradays of electricity required to liberate 12 g of hydrogen is:
If a current of 0.5 ampere flows through a metallic wire for 2 hours, then how many electrons would flow through the wire?
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?
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
Calculate the mass of Ag deposited at cathode when a current of 2 amperes was passed through a solution of AgNO3 for 15 minutes.
(Given : Molar mass of Ag = 108 g mol−1 lF = 96500 C mol−1)
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 \[\ce{CuSO4}\] 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.
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).
