Electrochemistry PYQs - Last 10 Years
NEET / Chemistry / Physical Chemistry / 26 recent questions
ChemistryPhysical Chemistry2017-2026
Practice 26 NEET 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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2017-2026
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Last 10 Years Electrochemistry Questions
Showing 26 of 26 filtered questions.
1Electrochemistry
The standard electrode potential ( $\mathrm{E}^{\circ}$ ) for the half-cell reaction $\mathrm{Fe}^{3+}+\mathrm{e}^{-} \rightarrow \mathrm{Fe}^{2+}$ at 298 K is (Given : $\mathrm{E}^{\circ}\left(\mathrm{Fe}^{3+} / \mathrm{Fe}\right)=-0.04 \m...
MCQ+4 / -12026
2Electrochemistry
For a salt XY, which is a strong electrolyte, the plot of $\Lambda_{\mathrm{m}}$ versus $\sqrt{\mathrm{c}}$ has a slope of $-90.0 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-3 / 2} \mathrm{L}^{1 / 2}$ at 298 K . At 0.01 M concentration of $\...
MCQ+4 / -12026
3Electrochemistry
Calculate emf of the half cell given below :
$$ \begin{aligned} & \mathrm{Pt}(\mathrm{~s})\left|\mathrm{H}_2(\mathrm{~g}, 2 \mathrm{~atm})\right| \mathrm{HCl}(\mathrm{aq}, 0.02 \mathrm{M}) \\ & \mathrm{E}_{\mathrm{H}_2 / \mathrm{H}^{+}}^{\c...
$$ \begin{aligned} & \mathrm{Pt}(\mathrm{~s})\left|\mathrm{H}_2(\mathrm{~g}, 2 \mathrm{~atm})\right| \mathrm{HCl}(\mathrm{aq}, 0.02 \mathrm{M}) \\ & \mathrm{E}_{\mathrm{H}_2 / \mathrm{H}^{+}}^{\c...
MCQ+4 / -12026
4Electrochemistry
A solution of copper sulphate is electrolysed for 10 minutes with a current of 1.5 amperes. The mass of copper deposited at cathode is :
(Given : Molar mass of $\mathrm{Cu}=63 \mathrm{~g} \mathrm{~mol}^{-1}$;
$$ \left.1 \mathrm{~F}=96487 \m...
(Given : Molar mass of $\mathrm{Cu}=63 \mathrm{~g} \mathrm{~mol}^{-1}$;
$$ \left.1 \mathrm{~F}=96487 \m...
MCQ+4 / -12026
5Electrochemistry
The standard cell potential of the following cell \(\mathrm{Zn}\left|\mathrm{Zn}^{2+}(\mathrm{aq})\right| \mathrm{Fe}^{2+}(\mathrm{aq}) \mid \mathrm{Fe}\) is \(0.32 \mathrm{~V}\). Calculate the standard Gibbs energy change for the reaction:...
MCQ+4 / -12024
6Electrochemistry
From the following select the one which is not an example of corrosion.
MCQ+4 / -12024
7Electrochemistry
Mass in grams of copper deposited by passing 9.6487 A current through a voltmeter containing copper sulphate solution for 100 seconds is (Given : Molar mass of $$\mathrm{Cu}: 63 \mathrm{~g} \mathrm{~mol}^{-1}, 1 \mathrm{~F}=96487 \mathrm{C}...
MCQ+4 / -12024
8Electrochemistry
Match List I with List II.
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overflow:hidden;padding:10px 5px;word-break:normal;}...
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overflow:hidden;padding:10px 5px;word-break:normal;}...
MCQ+4 / -12024
9Electrochemistry
The correct value of cell potential in volt for the reaction that occurs when the following two half cells are connected, is
$$\begin{aligned}
& \mathrm{Fe}_{(\mathrm{aq})}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Fe}(\mathrm{s}), \mathrm{...
$$\begin{aligned}
& \mathrm{Fe}_{(\mathrm{aq})}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Fe}(\mathrm{s}), \mathrm{...
MCQ+4 / -12023
10Electrochemistry
Molar conductance of an electrolyte increase with dilution according to the equation:
\(\Lambda_{\mathrm{m}}=\Lambda_{\mathrm{m}}^{\circ}-\mathrm{A} \sqrt{\mathrm{c}}\)
Which of the following statements are true?
(A) This equation applies t...
\(\Lambda_{\mathrm{m}}=\Lambda_{\mathrm{m}}^{\circ}-\mathrm{A} \sqrt{\mathrm{c}}\)
Which of the following statements are true?
(A) This equation applies t...
MCQ+4 / -12023
11Electrochemistry
The \(\mathrm{E}^{\Theta}\) values for
$$\begin{aligned}
& \mathrm{Al}^{+} / \mathrm{Al}=+0.55 \mathrm{~V} \text { and } \mathrm{Tl}^{+} / \mathrm{Tl}=-0.34 \mathrm{~V} \\
& \mathrm{Al}^{3+} / \mathrm{Al}=-1.66 \mathrm{~V} \text { and } \ma...
$$\begin{aligned}
& \mathrm{Al}^{+} / \mathrm{Al}=+0.55 \mathrm{~V} \text { and } \mathrm{Tl}^{+} / \mathrm{Tl}=-0.34 \mathrm{~V} \\
& \mathrm{Al}^{3+} / \mathrm{Al}=-1.66 \mathrm{~V} \text { and } \ma...
MCQ+4 / -12023
12Electrochemistry
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A : In equation \(\mathrm{\Delta_rG=-nFE_{cell}}\), value of \(\mathrm{\Delta_rG}\) depends on n.
Reason R : $$\mathrm{E_{cell}}...
Assertion A : In equation \(\mathrm{\Delta_rG=-nFE_{cell}}\), value of \(\mathrm{\Delta_rG}\) depends on n.
Reason R : $$\mathrm{E_{cell}}...
MCQ+4 / -12023
13Electrochemistry
The conductivity of centimolar solution of \(\mathrm{KCl}\) at \(25^{\circ} \mathrm{C}\) is \(0.0210 ~\mathrm{ohm}^{-1} \mathrm{~cm}^{-1}\) and the resistance of the cell containing the solution at \(25^{\circ} \mathrm{C}\) is $$60 ~\mathrm...
MCQ+4 / -12023
14Electrochemistry
Standard electrode potential for the cell with cell reaction
Zn(s) + Cu2+(aq) \(\to\) Zn2+(aq) + Cu(s)
is 1.1 V. Calculate the standard Gibbs energy change for the cell reaction. (Given F = 96487 C mol\(-\)1)
Zn(s) + Cu2+(aq) \(\to\) Zn2+(aq) + Cu(s)
is 1.1 V. Calculate the standard Gibbs energy change for the cell reaction. (Given F = 96487 C mol\(-\)1)
MCQ+4 / -12022
15Electrochemistry
Two half cell reactions are given below.
\(C{o^{3 + }} + {e^ - } \to C{o^{2 + }},\,\,\,\,\,\,\,\,\,E_{C{o^{2 + }}/C{o^{3 + }}}^0 = - 1.81\,V\)
\(2A{l^{3 + }} + 6{e^ - } \to 2Al(s),\,\,\,E_{Al/A{l^{3 + }}}^0 = + 1.66\,V\)
The standard EMF ...
\(C{o^{3 + }} + {e^ - } \to C{o^{2 + }},\,\,\,\,\,\,\,\,\,E_{C{o^{2 + }}/C{o^{3 + }}}^0 = - 1.81\,V\)
\(2A{l^{3 + }} + 6{e^ - } \to 2Al(s),\,\,\,E_{Al/A{l^{3 + }}}^0 = + 1.66\,V\)
The standard EMF ...
MCQ+4 / -12022
16Electrochemistry
Find the emf of the cell in which the following reaction takes place at 298 K
Ni(s) + 2Ag+ (0.001 M) \(\to\) Ni2+ (0.001 M) + 2Ag(s)
(Given that E\(_{cell}^o\) = 10.5 V, \({{2.303\,RT} \over F} = 0.059\) at 298 K)
Ni(s) + 2Ag+ (0.001 M) \(\to\) Ni2+ (0.001 M) + 2Ag(s)
(Given that E\(_{cell}^o\) = 10.5 V, \({{2.303\,RT} \over F} = 0.059\) at 298 K)
MCQ+4 / -12022
17Electrochemistry
Given below are half cell reactions:
\(MnO_4^ - + 8{H^ + } + 5{e^ - } \to M{n^{2 + }} + 4{H_2}O\),
\(E_{M{n^{2 + }}/MnO_4^ - }^o = - 1.510\,V\)
\({1 \over 2}{O_2} + 2{H^ + } + 2{e^ - } \to {H_2}O\)
\(E_{{O_2}/{H_2}O}^o = + 1.223\,V\)
Wil...
\(MnO_4^ - + 8{H^ + } + 5{e^ - } \to M{n^{2 + }} + 4{H_2}O\),
\(E_{M{n^{2 + }}/MnO_4^ - }^o = - 1.510\,V\)
\({1 \over 2}{O_2} + 2{H^ + } + 2{e^ - } \to {H_2}O\)
\(E_{{O_2}/{H_2}O}^o = + 1.223\,V\)
Wil...
MCQ+4 / -12022
18Electrochemistry
At 298 K, the standard electrode potentials of Cu2+ / Cu, Zn2+ / Zn, Fe2+ / Fe and Ag+ / Ag are 0.34 V, \(-\)0.76 V, \(-\)0.44 V V and 0.80 V, respectively.
On the basis of standard electrode potential, predict which of the following reacti...
On the basis of standard electrode potential, predict which of the following reacti...
MCQ+4 / -12022
19Electrochemistry
The molar conductivity of 0.007 M acetic acid is 20 S cm2 mol\(-\)1. What is the dissociation constant of acetic acid? Choose the correct option.[\(\Lambda _{{H^ + }}^o\) = 350 S cm2 mol\(-\)1\(\Lambda _{C{H_3}CO{O^ - }}^o\) = 50 S cm2 mol$...
MCQ+4 / -12021
20Electrochemistry
The molar conductance of NaCl, HCl and CH3COONa at infinite dilution are 126.45, 426.16 and 91.0 S cm2 mol\(-\)1 respectively. The molar conductance of CH3COOH at infinite dilution is. Choose the right option for your answer.
MCQ+4 / -12021
21Electrochemistry
On electrolysis of dil. sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be :
MCQ+4 / -12020
22Electrochemistry
The number of Faradays(F) required to produce 20 g of calcium from molten CaCl2 (Atomic mass of Ca = 40 g mol-1) is :
MCQ+4 / -12020
23Electrochemistry
For the cell reaction
2Fe3+(aq) + 2I–
(aq) \(\to\) 2Fe2+(aq) + I2(aq)
\({E_{cell}^\Theta }\) = 0.24 V at 298 K. The standard Gibbs energy (\(\Delta\)rGo) of the cell reaction is :
[Given that Faraday constant F = 96500 C mol–1]
2Fe3+(aq) + 2I–
(aq) \(\to\) 2Fe2+(aq) + I2(aq)
\({E_{cell}^\Theta }\) = 0.24 V at 298 K. The standard Gibbs energy (\(\Delta\)rGo) of the cell reaction is :
[Given that Faraday constant F = 96500 C mol–1]
MCQ+4 / -12019
24Electrochemistry
For a cell involving one electron \(E_{cell}^\Theta\) = 0.59 V at 298 K, the equilibrium constant for the cell reaction is :
[Given that \({{2.303RT} \over F}\) = 0.059 V at T = 298 K ]
[Given that \({{2.303RT} \over F}\) = 0.059 V at T = 298 K ]
MCQ+4 / -12019
25Electrochemistry
Consider the change in oxidation state of
bromine corresponding to different emf values
as shown in the given diagram :
Then the species undergoing disproportionation
is :
bromine corresponding to different emf values
as shown in the given diagram :
Then the species undergoing disproportionation
is :
MCQ+4 / -12018
26Electrochemistry
In the electrochemical cell :
\(Zn\left| {ZnS{O_4}\left( {0.01\,M} \right)} \right|\)\(\left| {CuS{O_4}\left( {1.0M} \right)} \right|Cu,\)
the emf of this Daniell cell is E1. When the concentration of ZnSO4 is changed to 1.0 M and that of C...
\(Zn\left| {ZnS{O_4}\left( {0.01\,M} \right)} \right|\)\(\left| {CuS{O_4}\left( {1.0M} \right)} \right|Cu,\)
the emf of this Daniell cell is E1. When the concentration of ZnSO4 is changed to 1.0 M and that of C...
MCQ+4 / -12017