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Electrochemistry PYQs - Last 5 Years

JEE Main / Chemistry / Physical Chemistry / 124 recent questions

ChemistryPhysical Chemistry2022-2026
All Electrochemistry PYQsLast 10 YearsCreate chapter test

Practice 124 JEE Main Chemistry questions from Electrochemistry. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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2022-2026
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124PYQs
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124 in last 5 years124 in last 10 years

Last 5 Years Electrochemistry Questions

Showing 50 of 124 filtered questions.

1Electrochemistry
A conductivity cell with two electrodes (dark side) are half filled with infinitely dilute aqueous solution of a weak electrolyte. If volume is doubled by adding more water at constant temperature, the molar conductivity of the cell will -
MCQ+4 / -12024
2Electrochemistry
How can an electrochemical cell be converted into an electrolytic cell ?
MCQ+4 / -12024
3Electrochemistry
Molar ionic conductivities of divalent cation and anion are \(57 \mathrm{~S~cm}^2 \mathrm{~mol}^{-1}\) and \(73 \mathrm{~S~cm}^2 \mathrm{~mol}^{-1}\) respectively. The molar conductivity of solution of an electrolyte with the above cation a...
MCQ+4 / -12024
4Electrochemistry
The reaction at cathode in the cells commonly used in clocks involves.
MCQ+4 / -12024
5Electrochemistry
For the electro chemical cell
\(\mathrm{M}\left|\mathrm{M}^{2+}\right||\mathrm{X}| \mathrm{X}^{2-}\)
If \(\mathrm{E}_{\left(\mathrm{M}^{2+} / \mathrm{M}\right)}^0=0.46 \mathrm{~V}\) and $$\mathrm{E}_{\left(\mathrm{x} / \mathrm{x}^{2-}\right...
MCQ+4 / -12024
6Electrochemistry
The quantity of silver deposited when one coulomb charge is passed through \(\mathrm{AgNO}_3\) solution :
MCQ+4 / -12024
7Electrochemistry
What pressure (bar) of \(\mathrm{H}_2\) would be required to make emf of hydrogen electrode zero in pure water at \(25^{\circ} \mathrm{C}\) ?
MCQ+4 / -12024
8Electrochemistry
One of the commonly used electrode is calomel electrode. Under which of the following categories, calomel electrode comes?
MCQ+4 / -12024
9Electrochemistry
For a strong electrolyte, a plot of molar conductivity against (concentration) \({ }^{1 / 2}\) is a straight line, with a negative slope, the correct unit for the slope is
MCQ+4 / -12024
10Electrochemistry
Fuel cell, using hydrogen and oxygen as fuels,
A. has been used in spaceship
B. has as efficiency of \(40 \%\) to produce electricity
C. uses aluminum as catalysts
D. is eco-friendly
E. is actually a type of Galvanic cell only
Choose the co...
MCQ+4 / -12024
11Electrochemistry
One Faraday of electricity liberates \(x \times 10^{-1}\) gram atom of copper from copper sulphate. \(x\) is ________.
INTEGER+4 / -12024
12Electrochemistry
Number of alkanes obtained on electrolysis of a mixture of \(\mathrm{CH}_3 \mathrm{COONa}\) and \(\mathrm{C}_2 \mathrm{H}_5 \mathrm{COONa}\) is ________.
INTEGER+4 / -12024
13Electrochemistry
Identify the factor from the following that does not affect electrolytic conductance of a solution.
MCQ+4 / -12024
14Electrochemistry
The values of conductivity of some materials at $298.15 \mathrm{~K}^{-1} ~\text{in} ~\mathrm{Sm}^{-1}$ are $2.1 \times 10^3$, $1.0 \times 10^{-16}, 1.2 \times 10,3.91,1.5 \times 10^{-2}, 1 \times 10^{-7}, 1.0 \times 10^3$. The number of con...
INTEGER+4 / -12024
15Electrochemistry
Reduction potential of ions are given below:
$$\begin{array}{ccc}
\mathrm{ClO}_4^{-} & \mathrm{IO}_4^{-} & \mathrm{BrO}_4^{-} \\
\mathrm{E}^{\circ}=1.19 \mathrm{~V} & \mathrm{E}^{\circ}=1.65 \mathrm{~V} & \mathrm{E}^{\circ}=1.74 \mathrm{~V}...
MCQ+4 / -12024
16Electrochemistry
Alkaline oxidative fusion of \(\mathrm{MnO}_2\) gives "A" which on electrolytic oxidation in alkaline solution produces B. A and B respectively are
MCQ+4 / -12024
17Electrochemistry
The mass of zinc produced by the electrolysis of zine sulphate solution with a steady current of \(0.015 \mathrm{~A}\) for 15 minutes is _________ \(\times 10^{-4} \mathrm{~g}\).
(Atomic mass of zinc \(=65.4 \mathrm{~amu}\))
INTEGER+4 / -12024
18Electrochemistry
A constant current was passed through a solution of \(\mathrm{AuCl}_4^{-}\) ion between gold electrodes. After a period of 10.0 minutes, the increase in mass of cathode was \(1.314 \mathrm{~g}\). The total charge passed through the solution...
INTEGER+4 / -12024
19Electrochemistry
The mass of silver (Molar mass of \(\mathrm{Ag}: 108 \mathrm{~gmol}^{-1}\) ) displaced by a quantity of electricity which displaces \(5600 \mathrm{~mL}\) of \(\mathrm{O}_2\) at S.T.P. will be ______ g.
INTEGER+4 / -12024
20Electrochemistry
The hydrogen electrode is dipped in a solution of \(\mathrm{pH}=3\) at \(25^{\circ} \mathrm{C}\). The potential of the electrode will be _________ \(\times 10^{-2} \mathrm{~V}\).
$$\left(\frac{2.303 \mathrm{RT}}{\mathrm{F}}=0.059 \mathrm{~V...
INTEGER+4 / -12024
21Electrochemistry
Which of the following statements is not correct about rusting of iron?
MCQ+4 / -12024
22Electrochemistry
The potential for the given half cell at $298 \mathrm{~K}$ is (-) __________ $\times 10^{-2} \mathrm{~V}$
$$
\begin{aligned}
& 2 \mathrm{H}_{(\mathrm{aq})}^{+}+2 \mathrm{e}^{-} \longrightarrow \mathrm{H}_2(\mathrm{~g}) \\\\
& {\left[\mathrm...
INTEGER+4 / -12024
23Electrochemistry
Consider the following redox reaction :
\(\mathrm{MnO}_4^{-}+\mathrm{H}^{+}+\mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4 \rightleftharpoons \mathrm{Mn}^{2+}+\mathrm{H}_2 \mathrm{O}+\mathrm{CO}_2\)

The standard reduction potentials are given as...
INTEGER+4 / -12024
24Electrochemistry
The amount of electricity in Coulomb required for the oxidation of $1 \mathrm{~mol}$ of $\mathrm{H}_2 \mathrm{O}$ to $\mathrm{O}_2$ is __________ $\times 10^5 \mathrm{C}$.
INTEGER+4 / -12024
25Electrochemistry
The reaction
\(\frac{1}{2} \mathrm{H}_{2}(\mathrm{~g})+\mathrm{AgCl}(\mathrm{s}) \rightleftharpoons \mathrm{H}^{+}(\mathrm{aq})+\mathrm{Cl}^{-}(\mathrm{aq})+\mathrm{Ag}(\mathrm{s})\)
occurs in which of the given galvanic cell.
MCQ+4 / -12023
26Electrochemistry
The number of incorrect statements from the following is ___________.
A. The electrical work that a reaction can perform at constant pressure and temperature is equal to the reaction Gibbs energy.
B. \(\mathrm{E_{cell}^{\circ}}\) cell is de...
INTEGER+4 / -12023
27Electrochemistry
The standard electrode potential of \(\mathrm{M}^{+} / \mathrm{M}\) in aqueous solution does not depend on
MCQ+4 / -12023
28Electrochemistry
The standard reduction potentials at \(298 \mathrm{~K}\) for the following half cells are given below:
$$\mathrm{NO}_{3}^{-}+4 \mathrm{H}^{+}+3 \mathrm{e}^{-} \rightarrow \mathrm{NO}(\mathrm{g})+2 \mathrm{H}_{2} \mathrm{O} \quad \mathrm{E}^...
INTEGER+4 / -12023
29Electrochemistry
The logarithm of equilibrium constant for the reaction \(\mathrm{Pd}^{2+}+4 \mathrm{Cl}^{-} \rightleftharpoons \mathrm{PdCl}_{4}^{2-}\) is ___________ (Nearest integer)
Given : \(\frac{2.303 R \mathrm{~T}}{\mathrm{~F}}=0.06 \mathrm{~V}\)
$$...
INTEGER+4 / -12023
30Electrochemistry
Which one of the following statements is correct for electrolysis of brine solution?
MCQ+4 / -12023
31Electrochemistry
The resistivity of a $0.8 \mathrm{M}$ solution of an electrolyte is $5 \times 10^{-3} \Omega~ \mathrm{cm}$. Its molar conductivity is _________ $\times 10^{4}~ \Omega^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$. (Nearest integer)
INTEGER+4 / -12023
32Electrochemistry
Consider the cell
$$\mathrm{Pt}_{(\mathrm{s})}\left|\mathrm{H}_{2}(\mathrm{~g}, 1 \mathrm{~atm})\right| \mathrm{H}^{+}(\mathrm{aq}, 1 \mathrm{M})|| \mathrm{Fe}^{3+}(\mathrm{aq}), \mathrm{Fe}^{2+}(\mathrm{aq}) \mid \operatorname{Pt}(\mathrm{...
INTEGER+4 / -12023
33Electrochemistry
The electrode potential of the following half cell at $298 \mathrm{~K}$

$\mathrm{X}\left|\mathrm{X}^{2+}(0.001 \mathrm{M}) \| \mathrm{Y}^{2+}(0.01 \mathrm{M})\right| \mathrm{Y}$ is _______ $\times 10^{-2} \mathrm{~V}$ (Nearest integer)

Gi...
INTEGER+4 / -12023
34Electrochemistry
Following figure shows dependence of molar conductance of two electrolytes on concentration. \(\Lambda \mathop m\limits^o\) is the limiting molar conductivity.

The number of \(\mathrm{\underline {incorrect} }\) statement(s) from the follo...
INTEGER+4 / -12023
35Electrochemistry
The standard electrode potential \(\mathrm{(M^{3+}/M^{2+})}\) for V, Cr, Mn & Co are \(-\)0.26 V, \(-\)0.41 V, + 1.57 V and + 1.97 V, respectively. The metal ions which can liberate \(\mathrm{H_2}\) from a dilute acid are :
MCQ+4 / -12023
36Electrochemistry
The equilibrium constant for the reaction
\(\mathrm{Zn(s)+Sn^{2+}(aq)}\) \(\rightleftharpoons\) \(\mathrm{Zn^{2+}(aq)+Sn(s)}\) is \(1\times10^{20}\) at 298 K. The magnitude of standard electrode potential of \(\mathrm{Sn/Sn^{2+}}\) if $$\ma...
INTEGER+4 / -12023
37Electrochemistry
Consider the cell
\(\mathrm{Pt(s)|{H_2}(g)\,(1\,atm)|{H^ + }\,(aq,[{H^ + }] = 1)||F{e^{3 + }}(aq),F{e^{2 + }}(aq)|Pt(s)}\)
Given \(\mathrm{E_{F{e^{3 + }}/F{e^{2 + }}}^o = 0.771\,V}\) and $$\mathrm{E_{{H^ + }/1/2\,{H_2}}^o = 0\,V,\,T = 298\,...
INTEGER+4 / -12023
38Electrochemistry
\(Pt(s)|{H_2}(g)(1\,bar)|{H^ + }(aq)(1\,M)||{M^{3 + }}(aq),{M^ + }(aq)|Pt(s)\)
The \(\mathrm{E_{cell}}\) for the given cell is 0.1115 V at 298 K when \({{\left[ {{M^ + }(aq)} \right]} \over {\left[ {{M^{3 + }}(aq)} \right]}} = {10^a}\)
The ...
INTEGER+4 / -12023
39Electrochemistry
At 298 K, a 1 litre solution containing 10 mmol of \(\mathrm{C{r_2}O_7^{2 - }}\) and 100 mmol of \(\mathrm{Cr^{3+}}\) shows a pH of 3.0.
Given : \(\mathrm{C{r_2}O_7^{2 - } \to C{r^{3 + }}\,;\,E^\circ = 1.330}\)V
and $$\mathrm{{{2.303\,RT} ...
INTEGER+4 / -12023
40Electrochemistry
Choose the correct representation of conductometric titration of benzoic acid vs sodium hydroxide.
MCQ+4 / -12023
41Electrochemistry
At what pH, given half cell \(\mathrm{MnO_{4}^{-}(0.1~M)~|~Mn^{2+}(0.001~M)}\) will have electrode potential of 1.282 V? ___________ (Nearest Integer)
Given $$\mathrm{E_{MnO_4^ - |M{n^{2 + }}}^o}=1.54~\mathrm{V},\frac{2.303\mathrm{RT}}{\mat...
INTEGER+4 / -12023
42Electrochemistry
\(1 \times 10^{-5} ~\mathrm{M} ~\mathrm{AgNO}_{3}\) is added to \(1 \mathrm{~L}\) of saturated solution of \(\mathrm{AgBr}\). The conductivity of this solution at \(298 \mathrm{~K}\) is _____________ $$\times 10^{-8} \mathrm{~S} \mathrm{~m}...
INTEGER+4 / -12023
43Electrochemistry
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A) : An aqueous solution of \(\mathrm{KOH}\) when used for volumetric analysis, its concentration should be checked before ...
MCQ+4 / -12023
44Electrochemistry
The number of correct statements from the following is _______.
(A) Conductivity always decreases with decrease in concentration for both strong and weak electrolytes.

(B) The number of ions per unit volume that carry current in a solution...
INTEGER+4 / -12023
45Electrochemistry
A metal surface of \(100 \mathrm{~cm}^{2}\) area has to be coated with nickel layer of thickness \(0.001 \mathrm{~mm}\). A current of \(2 \mathrm{~A}\) was passed through a solution of \(\mathrm{Ni}\left(\mathrm{NO}_{3}\right)_{2}\) for '$$...
INTEGER+4 / -12023
46Electrochemistry
At \(298 \mathrm{~K}\), the standard reduction potential for \(\mathrm{Cu}^{2+} / \mathrm{Cu}\) electrode is \(0.34 \mathrm{~V}\).
Given : \(\mathrm{K}_{\mathrm{sp}} \mathrm{Cu}(\mathrm{OH})_{2}=1 \times 10^{-20}\)
Take $$\frac{2.303 \mathr...
INTEGER+4 / -12023
47Electrochemistry
For lead storage battery pick the correct statements
A. During charging of battery, \(\mathrm{PbSO}_{4}\) on anode is converted into \(\mathrm{PbO}_{2}\)
B. During charging of battery, \(\mathrm{PbSO}_{4}\) on cathode is converted into $$\m...
MCQ+4 / -12023
48Electrochemistry
In an electrochemical reaction of lead, at standard temperature, if \(\mathrm{E}^{0}\left(\mathrm{~Pb}^{2+} / \mathrm{Pb}\right)=\mathrm{m}\) Volt and \(\mathrm{E}^{0}\left(\mathrm{~Pb}^{4+} / \mathrm{Pb}\right)=\mathrm{n}\) Volt, then the ...
INTEGER+4 / -12023
49Electrochemistry
The number of correct statements from the following is __________
A. \(\mathrm{E_{\text {cell }}}\) is an intensive parameter
B. A negative \(\mathrm{E}^{\ominus}\) means that the redox couple is a stronger reducing agent than the $$\mathrm...
INTEGER+4 / -12023
50Electrochemistry
\(\mathrm{FeO_4^{2 - }\buildrel { + 2.2V} \over \longrightarrow F{e^{3 + }}\buildrel { + 0.70V} \over \longrightarrow F{e^{2 + }}\buildrel { - 0.45V} \over \longrightarrow F{e^0}}\)
\(E_{FeO_4^{2 - }/F{e^{2 + }}}^\theta\) is $$x \times ...
INTEGER+4 / -12023