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Previous year question hub

Electrochemistry - Physical Chemistry - Chemistry Previous Year Questions

Practice Electrochemistry - Physical Chemistry - Chemistry previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

9Papers
8Years
16Questions
1Topics

Electrochemistry question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Electrochemistry. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Not classified 16 100%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

Multiple Choices 16 100%

Subject weightage

Top subjects by unique question coverage.

Chemistry
16 Qs

Most asked topics

Top topics across the included previous year papers.

Physical Chemistry
16 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Electrochemistry
16 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

VITEEE 2025
2 Qs
WB JEE 2025
1 Qs
WB JEE 2024
1 Qs
WB JEE 2023
2 Qs
WB JEE 2021
2 Qs
WB JEE 2019
3 Qs
WB JEE 2018
2 Qs
WB JEE 2017
2 Qs
WB JEE 2016
1 Qs

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
VITEEE 202520252View paper
WB JEE 202520251View paper
WB JEE 202420241View paper
WB JEE 202320232View paper
WB JEE 202120212View paper
WB JEE 201920193View paper
WB JEE 201820182View paper
WB JEE 201720172View paper
WB JEE 201620161View paper

All Electrochemistry previous year questions

Practice every matching question in batches of 20, with every available option.

1
2016 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2016
The order of equivalent conductance at infinite dilution for LiCl, NaCl and KCl is
A
LiCl > NaCl > KCl
B
KCl > NaCl > LiCl
C
NaCl > KCl > LiCl
D
LiCl > KCl > NaCl
Open complete paper
2
2017 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2017
How many faradays are required to reduce 1 mol of \(C{r_2}O_7^{2 - }\) to Cr3+ in acid medium?
A
2
B
3
C
5
D
6
Open complete paper
3
2017 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2017
The role of fluorspar, which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite is
A
as a catalyst
B
to make fused mixture conducting
C
to lower the melting temperature of the mixture
D
to decrease the rate of oxidation of carbon at anode
Open complete paper
4
2018 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2018
Given the standard half-cell potentials (E\(^\circ\)) of the following as

$$\matrix{ {Zn \to Z{n^{2 + }} + 2{e^ - };} & {{E^o} = + 0.76V} \cr {Fe \to F{e^{2 + }} + 2{e^ - };} & {{E^o} = 0.41V} \cr }$$

Then the standard e.m.f. of the cell with the reaction \(F{e^{2 + }} + Zn \to Z{n^{2 + }} + Fe\) is
A
\(-\)0.35 V
B
+ 0.35 V
C
+ 1.17 V
D
\(-\)1.17 V
Open complete paper
5
2018 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2018
What amount of electricity can deposit 1 mole of Al metal at cathode when passed through molten AlCl3 ?
A
0.3F
B
1F
C
3F
D
1/3F
Open complete paper
6
2019 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2019
If electrolysis of aqueous CuSO4 solution is carried out using Cu-electrodes, the reaction taking place at the anode is
A
H+ + e\(-\) \(\to\) H
B
Cu2+ (aq) + 2e\(-\) \(\to\) Cu (s)
C
SO\(_4^{2 - }\) (aq) \(-\) 2e\(-\) \(\to\) SO4
D
Cu(s) \(-\) 2e\(-\) \(\to\) Cu2+ (aq)
Open complete paper
7
2019 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2019
Identify the correct statement(s) :
A
The oxidation number of Cr in CrO5 is + 6.
B
\(\Delta\)H > \(\Delta\)U for the reaction N2O4(g) \(\to\) 2NO2(g) provided both gases behave ideally.
C
pH of 0.1 N H2SO4 is less than that of 0.1 N HCl at 25\(^\circ\)C.
D
\(\left( {{{RT} \over F}} \right)\) = 0.0591 volt at 25\(^\circ\)C
Open complete paper
8
2019 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2019
The charge carried by 1 millimole of Mn+ ions is 193 coulombs. The value of n is
A
1
B
2
C
3
D
4
Open complete paper
9
2021 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2021
The reduction potential of hydrogen half-cell will be negative if
A
p(H2) = 1 atm and [H+] = 1.0 M
B
p(H2) = 1 atm and [H+] = 2.0 M
C
p(H2) = 2 atm and [H+] = 1.0 M
D
p(H2) = 2 atm and [H+] = 2.0 M
Open complete paper
10
2021 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2021
Which of the following solutions will have highest conductivity?
A
0.1 M CH3COOH
B
0.1 M NaCl
C
0.1 M KNO3
D
0.1 M HCl
Open complete paper
11
2023 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2023

\(\mathrm{BrF_3}\) self ionises as following

A
\(\mathrm{2BrF_3\rightleftharpoons BrF^+ + BrF_5^-}\)
B
\(\mathrm{2BrF_3\rightleftharpoons BrF_2^+ + BrF_4^-}\)
C
\(\mathrm{2BrF_3\rightleftharpoons BrF_4^+ + BrF_2^-}\)
D
\(\mathrm{2BrF_3\rightleftharpoons BrF_3^+ + BrF_3^-}\)
Open complete paper
12
2023 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2023

The equivalent conductance of NaCl, HCl and CH\(_3\)COONa at infinite dilution are 126.45, 426.16 and 91 ohm\(^{-1}\)cm\(^2\)eq\(^{-1}\) respectively at 25\(^\circ\)C. The equivalent conductance of acetic acid (at infinite dilution) would be

A
461.61 ohm\(^{-1}\)cm\(^2\)eq\(^{-1}\)
B
390.71 ohm\(^{-1}\)cm\(^2\)eq\(^{-1}\)
C
cannot be determined from the given data.
D
208.71 ohm\(^{-1}\)cm\(^2\)eq\(^{-1}\)
Open complete paper
13
2024 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2024

Identify the correct statement(s) :

A
The oxidation number of \(\mathrm{Cr}\) in \(\mathrm{CrO}_5\) is +6
B
\(\Delta \mathrm{H}>\Delta \mathrm{U}\) for the reaction \(\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g}) \rightarrow 2 \mathrm{NO}_2\) (g), provided both gases behave ideally
C
\(\mathrm{pH}\) of \(0.1(\mathrm{~N}) \mathrm{H}_2 \mathrm{SO}_4\) is less than that of \(0.1(\mathrm{~N}) \mathrm{HCl}\) at \(25^{\circ} \mathrm{C}\)
D
\(\left(\frac{\mathrm{RT}}{\mathrm{F}}\right)=0.0591\) volt at \(25^{\circ} \mathrm{C}\)
Open complete paper
14
2025 · Chemistry · Physical Chemistry · Electrochemistry
WB JEE 2025

The molar conductances of $\mathrm{Ba}(\mathrm{OH})_2, \mathrm{BaCl}_2$ and $\mathrm{NH}_4 \mathrm{Cl}$ at infinite dilution are $523 \cdot 28,280 \cdot 0$ and $129.8 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$ respectively. The molar conductance of $\mathrm{NH}_4 \mathrm{OH}$ at infinite dilution will be

A
$125.72 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
B
$251.44 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
C
$502.88 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
D
$754.32 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
Open complete paper
15
2025 · Chemistry · Physical Chemistry · Electrochemistry
VITEEE 2025

6.35 g of copper (Atomic mass $=635 \mathrm{u}$ ) is deposited at the cathode from a $\mathrm{Cu}^{2+}$ solution using a certain quantity of electric charge.

The volume of oxygen gas liberated at STP from water electrolysis using the same quantity of electric charge is

A

5.6 L

B

11.2 L

C

1.12 L

D

2.8 L

Open complete paper
16
2025 · Chemistry · Physical Chemistry · Electrochemistry
VITEEE 2025

How long should water be electrolysed using 50 A current to release enough $\mathrm{H}_2$ gas to completely reduce 8.0 g of CuO ?

$\left(\mathrm{CuO}+\mathrm{H}_2 \longrightarrow \mathrm{Cu}+\mathrm{H}_2 \mathrm{O}\right.$; Atomic mass of $\mathrm{Cu}=635 \mathrm{u}$ )

A

1600 s

B

1930 s

C

2415 s

D

1280 s

Open complete paper