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प्रश्न
Define electrochemical cell
उत्तर
An electrochemical cell is a device capable of either deriving electrical energy from chemical reactions or facilitating chemical reactions through the introduction of electrical energy.
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संबंधित प्रश्न
Draw neat and labelled diagram of dry cell.
Write cell reaction in lead storage battery during discharge.
From the given cells:
Lead storage cell, Mercury cell, Fuel cell and Dry cell
Answer the following:
(i) Which cell is used in hearing aids?
(ii) Which cell was used in Apollo Space Programme?
(iii) Which cell is used in automobiles and inverters?
(iv) Which cell does not have long life?
What type of battery is mercury cell? Why is it more advantageous than dry cell?
Define terms: Fuel cell
Define the following terms: Secondary batteries
In the button cells widely used in watches and other devices, the following reaction takes place:
\[\ce{Zn_{(s)} + Ag2O_{(s)} + H2O_{(l)} -> Zn^{2+}_{( aq)} + 2Ag_{(s)} + 2OH^-_{( aq)}}\]
Determine ΔrGΘ and EΘ for the reaction.
Without losing its concentration; ZnCl2 solution cannot be kept in contact with
Give reasons:
Mercury cell delivers a constant potential during its life time.
Which one of the following statements is correct regarding the dry cell?
(P) Zinc container acts as an anode in dry cell.
(Q) Zinc container touches the paste of MnO2 and carbon.
(R) Dry cell can be charged easily.
(S) Graphite rod acts as a cathode in dry cell.
