EASY
Earn 100

Define anode and cathode.

Important Questions on Electrochemistry

MEDIUM

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)

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-.
MEDIUM

Some materials are given below:

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

EASY

At 298 K, the e.m.f. of the galvanic cell mentioned below is E0=1.1 V

ZnsZn2+10-3MCu2+0.1MCus

MEDIUM

Some materials are given below:

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Which is the anode of this cell?

MEDIUM
Draw a labelled diagram of Galvanic cell and explain cell reaction.
EASY
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)
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
MEDIUM

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

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

EASY
The device which convert the energy of combustion of fuels directly into electrical energy is called
EASY
Which of the following statements is/are TRUE for an electrochemical cell ?
HARD

The reaction occurs in which of the given galvanic cell?

12H2( g)+AgCl(s)H+(aq)+Cl-(aq)+Ag(s)

EASY
Draw a well labelled diagram of a voltaic cell.
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]

MEDIUM
A solution of NiNO32 is electrolyzed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode?
EASY
Two Faraday of electricity is passed through a solution of CuSO4 . The mass of copper deposited at the cathode is: (Atomic mass of Cu = 63.5 amu)
MEDIUM
What is electrochemical cell? Explain its working with the help of diagram.
EASY
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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:
HARD
What are galvanic cells? Explain the working of a galvanic cell with a neat sketch taking Daniel cell as example.