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A half cell is prepared by dipping Ag electrode in a solution containing KCl and some AgCl. Half cell is used as cathode during the cell reaction. Quantity of AgCl will –

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Important Questions on Electrochemistry

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Some materials are given below:

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Write the chemical equation fo the reaction taking place at the cathode.

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What is electrochemical cell? Explain its working with the help of diagram.
EASY
Draw a well labelled diagram of a voltaic cell.
EASY
A galvanic cell transforms the energy released by a spontaneous redox reaction into electrical energy that can be used to perform work. In a galvanic cell, electrons flow from
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Some materials are given below:

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From the given materials, choose the appropriate ones to construct a galvanic cell and draw the diagram of the cell.

(Order of reactivity: Mg>Fe>Cu> Ag)

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Depict the galvanic cell in which the reaction takes place. Further show, which of the electrode is negatively charged.

Zns+2Ag+aqZn2+aq+2Ags.

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The standard Gibbs energy for the given cell reaction in kJ mol-1 at 298 K is:
Zns+Cu2+aqZn2+aq+Cu(s) ,
E0=2 V at 298 K
(Faraday's constant ,F=96000 C mol-1)
HARD
What are galvanic cells? Explain the working of a galvanic cell with a neat sketch taking Daniel cell as example.
EASY
In the electrode of the first kind Cl2/Cl-, the electrode material Cl2 is a non-conductor. How can the electron transfer be carried out with the ion Cl-.
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The device which convert the energy of combustion of fuels directly into electrical energy is called
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At 298 K, the e.m.f. of the galvanic cell mentioned below is E0=1.1 V

ZnsZn2+10-3MCu2+0.1MCus

HARD

The reaction occurs in which of the given galvanic cell?

12H2( g)+AgCl(s)H+(aq)+Cl-(aq)+Ag(s)

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Draw a labelled diagram of Galvanic cell and explain cell reaction.
HARD

For the cell Zn sZnSO4 aqCuSO4 aqCu s, when the concentration of Zn2+ is 10 times the concentration of Cu2+, the expression for ΔG in J mol-1 is

[F=Faraday's constant, R=universal gas constant, T=temperature, Eocell=1.1 V]

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Four successive members of the first row of transition elements are listed below with atomic numbers. Which one of them is expected to have the highest EM3+/M2+o value?
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The following reaction takes place at 298 K in an electrochemical cell involving two metals A and B,

A2+aq+BsB2+aq+As

with A2+=4×10-3 M and B2+=2×10-3 M in the respective half-cells, the cell EMF is 1.091 V. The equilibrium constant of the reaction is closest to;

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Some materials are given below:

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Which is the anode of this cell?

EASY
Which of the following statements is/are TRUE for an electrochemical cell ?
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ECu2+|Cu0=+0.34 V
EZn2+|Zn0=0.76 V
Identify the incorrect statement from the options below for the above cell: