JEE-ADVANCED SERIES Chemistry
Electrochemistry
23 previous year questions.
Volume: 23 Ques
Yield: High
High-Yield Trend
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2025 1
2024 4
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1999 1
1997 Chapter Questions 23 MCQs
01
PYQ 1981
medium
chemistry ID: jee-adva
The standard reduction potentials at 298K for the following half cells are given :
1
Zn(s)
2
Cr(s)
3
4
02
PYQ 1983
medium
chemistry ID: jee-adva
Faraday's laws of electrolysis are related to the
1
atomic number of the cation
2
atomic number of the anion
3
equivalent weight of the electrolyte
4
speed of the cation
03
PYQ 1984
easy
chemistry ID: jee-adva
The electric charge for electrode deposition of one gram equivalent of a substance is
1
one ampere per second
2
96,500 coulombs per second
3
one ampere for one hour
4
charge on one mole of electrons
04
PYQ 1984
medium
chemistry ID: jee-adva
A solution containing one mole per litre of each , and is being electrolysed by using inert electrodes. The values of standard electrode potentials in volts (reduction potential) are With increasing voltage, the sequence of deposition of metals or the cathode will be
1
2
3
4
05
PYQ 1997
medium
chemistry ID: jee-adva
The standard reduction potentials of and are 0.337 V and 0.153 V respectively. The standard electrode potential of half-cell is
1
0.184 V
2
0.887 V
3
0.521 V
4
0.490 V
06
PYQ 1999
medium
chemistry ID: jee-adva
A gas at atm is bubbled through a solution containing a mixture of and ions at . If the reduction potenital of , then
1
will oxidise but not
2
will oxidise both and
3
will oxidise but not
4
will reduce both and
07
PYQ 2001
medium
chemistry ID: jee-adva
Saturated solution of is used to make -salt-bridge- because
1
velocity of is greater than that of
2
velocity of is greater than that of
3
velocities of both and are nearly the same
4
is highly soluble in water
08
PYQ 2002
medium
chemistry ID: jee-adva
Standard electrode potential data are useful for understanding the suitability of an oxidant in a redox titration. Some half-cell reactions and their standard potentials are given below : Identify the incorrect statement regarding the quantitative estimation of aqueous
1
can be used in aqueous HCl
2
can be used in aqueous HCl
3
can be used in aqueous
4
can be used in aqueous
09
PYQ 2003
medium
chemistry ID: jee-adva
In the electrolytic cell, flow of electrons is from
1
cathode to anode in solution
2
cathode to anode through external supply
3
cathode to anode through internal supply
4
anode to cathode through internal supply
10
PYQ 2008
easy
chemistry ID: jee-adva
Electrolysis of dilute aqueous solution was carried out by passing current. The time required to liberate of gas at the cathode is
1
2
3
4
11
PYQ 2010
easy
chemistry ID: jee-adva
Among the following, intensive property is (properties are)
1
molar conductivity
2
electromotive force
3
resistance
4
heat capacity
12
PYQ 2011
medium
chemistry ID: jee-adva
(aqueous) was added to an aqueous solution gradually and the conductivity of the solution was measured. The plot of conductance versus the volume of is
1
(P)
2
(Q)
3
(R)
4
(S)
13
PYQ 2014
medium
chemistry ID: jee-adva
In a galvanic cell, the salt bridge
1
does not participate chemically in the cell reaction
2
stops the diffusion of ions from one electrode to another
3
is necessary for the occurrence of the cell reaction
4
ensures mixing of the two electrolytic solutions
14
PYQ 2019
medium
chemistry ID: jee-adva
Molar conductivity ( ) of aqueous solution of sodium stearate, which behaves as a strong electrolyte, is recorded at varying concentrations (c) of sodium stearate. Which one of the following plots provides the correct representation of micelle formation in the solution? (critical micelle concentration (CMC) is marked with an arrow in the figures)
1
2
3
4
15
PYQ 2020
medium
chemistry ID: jee-adva
Consider the following compounds in the liquid form:
When a charged comb is brought near their flowing stream, how many of them show deflection as per the following figure?
When a charged comb is brought near their flowing stream, how many of them show deflection as per the following figure?
16
PYQ 2020
medium
chemistry ID: jee-adva
Consider a efficient hydrogen-oxygen fuel cell working under standard conditions at bar and Its cell reaction is
The work derived from the cell on the consumption of of is used to compress of a monoatomic ideal gas in a thermally insulated container. What is the change in the temperature (in ) of the ideal gas?
The standard reduction potentials for the two half-cells are given below
Use
The work derived from the cell on the consumption of of is used to compress of a monoatomic ideal gas in a thermally insulated container. What is the change in the temperature (in ) of the ideal gas?
The standard reduction potentials for the two half-cells are given below
Use
17
PYQ 2021
medium
chemistry ID: jee-adva
Some standard electrode potentials at 298 K are given below:
Pb2+/Pb –0.13 V
Ni2+/Ni –0.24 V
C2+/Cd –0.40 V
Fe2+/Fe –0.44 V
To a solution containing 0.001 M of X2+ and 0.1 M of Y2+, the metal rods X and Y are inserted (at 298 K) and connected by a conducting wire. This resulted in the dissolution of X.
The correct combination(s) of X and Y, respectively, is(are)
(Given: Gas constant, R = 8.314 J K-1 mol-1, Faraday constant, F = 96500 C mol-1)
Pb2+/Pb –0.13 V
Ni2+/Ni –0.24 V
C2+/Cd –0.40 V
Fe2+/Fe –0.44 V
To a solution containing 0.001 M of X2+ and 0.1 M of Y2+, the metal rods X and Y are inserted (at 298 K) and connected by a conducting wire. This resulted in the dissolution of X.
The correct combination(s) of X and Y, respectively, is(are)
(Given: Gas constant, R = 8.314 J K-1 mol-1, Faraday constant, F = 96500 C mol-1)
1
Cd and Ni
2
Cd and Fe
3
Ni and Pb
4
Ni and Fe
18
PYQ 2022
medium
chemistry ID: jee-adva
The reduction potential of is
19
PYQ 2022
hard
chemistry ID: jee-adva
Consider the strong electrolytes and . Limiting molar conductivity of and are and , respectively. The value of is ______ Given:
is the limiting molar conductivity of ions. The plot of molar conductivity (A) of is given below
| Ion | Zn+ | Up+ | Vn+ | Xm- | Ym- |
| λ0 (S cm2 mol-1) | 50.0 | 25.0 | 100.0 | 80.0 | 100.0 |
is the limiting molar conductivity of ions. The plot of molar conductivity (A) of is given below
20
PYQ 2022
medium
chemistry ID: jee-adva
The correct option(s) about entropy (S) is(are)
gas constant, Faraday constant, Temperature
gas constant, Faraday constant, Temperature
1
For the reaction, , if , then the entropy change of the reaction is (assume that entropy and internal energy changes are temperature independent).
2
The cell reaction, , is an entropy driven process.
3
For racemization of an optically active compound, .
4
, for (where en ethylenediamine).
21
PYQ 2022
medium
chemistry ID: jee-adva
The reduction potential of is
22
PYQ 2024
easy
chemistry ID: jee-adva
An aqueous solution of hydrazine (N2H4) is electrochemically oxidized by O2, thereby releasing chemical energy in the form of electrical energy. One of the products generated from the electrochemical reaction is N2(g).
Choose the correct statement(s) about the above process
Choose the correct statement(s) about the above process
1
OH- ions react with N2H4 at the anode to form N2(g) and water, releasing 4 electrons to the anode.
2
At the cathode, N2H4 breaks to N2(g) and nascent hydrogen released at the electrode reacts with oxygen to form water.
3
At the cathode, molecular oxygen gets converted to OH-
4
Oxides of nitrogen are major by-products of the electrochemical process.
23
PYQ 2025
medium
chemistry ID: jee-adva
In an electrochemical cell, dichromate ions in aqueous acidic medium are reduced to . The current (in amperes) that flows through the cell for 48.25 minutes to produce 1 mole of is ____.
{Use: 1 Faraday