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JEE Electrochemistry PYQs with Solutions

526 previous year questions from Electrochemistry (JEE Main & Advanced Chemistry) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

526 questionsChemistry2006–2026Answers + solutions

About Electrochemistry PYQs

Electrochemistry has 526 previous year questions in the Quantrex Academy JEE Main & Advanced Chemistry bank. The 220 questions in this list come from JEE Main (185) and JEE Advanced (35), spanning 2006 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

Questions by year (this list)

  • 2026: 22
  • 2025: 26
  • 2024: 31
  • 2023: 25
  • 2022: 25
  • 2021: 24
  • 2020: 17
  • 2019: 14
  • 2018: 6
  • 2017: 7
  • 2016: 5
  • 2015: 2

Electrochemistry questions with solutions

1

At 300 K, the molar conductivities of the aqueous solutions of three salts at two different concentrations are given below: Salt Concentration (M) Molar conductivity (S cm ^2 mol

JEE Advanced 2026 Solution View → 2

Given at 298 K: E^ _ Fe^ 2+ /Fe = X Volt; E^ _ Fe^ 3+ /Fe = Y Volt. The E^ _ Fe^ 3+ /Fe^ 2+ in Volt at 298 K is given by:

JEE Main 2026 Solution View → 3

For a general redox reaction Anode : Red_1 arrow Ox_1^ n_1^+ + n_1 e^- Cathode : Ox_2 + n_2 e^- arrow Red_2^ n_2^- Which of the following statement is incorrect ?

JEE Main 2026 Solution View → 4

Consider the following data. Electrolyte Λ^ ∘ _m (S cm ^2 mol ^ -1 ) BaCl_2 x_1 H_2SO_4 x_2 HCl x_3 BaSO_4 is sparingly soluble in water. If the conductivity of the saturated

JEE Main 2026 Solution View → 5

One half cell in a voltaic cell is constructed by dipping silver rod in AgNO_3 solution of unknown concentration, other half cell is Zn rod dipped in 1 molar solution of ZnSO_4 .

JEE Main 2026 Solution View → 6

At 298 K , the molar conductivity of x\% (w/w) MX solution (aqueous) is 123.5 S cm^2 mol^ -1 . The conductance of same solution is 1.9 × 10^ -3 S . The value of x is _______ × 10^

JEE Main 2026 Solution View → 7

An electrochemical cell, consist of the following two redox couples, M^ x+ (aq)/M(s) [E_ red ^ =+0.15 V] and Fe^ 3+ (aq)/Fe(s) [E_ red ^ =-0.036 V] . The cell EMF (E_ cell ) is

JEE Main 2026 Solution View → 8

Consider the following two half-cell reactions along with the standard reduction potential given: CO_2 + 6H^+ + 6e^- arrow CH_3 OH + H_2 O E°_ red = 0.02 V (1)/(2) O_2 + 2H^+ +

JEE Main 2026 Solution View → 9

An electrochemical cell is constructed using half cells in the direction of spontaneous change Fe(OH)_2(s) + 2e^- arrow Fe(s) + 2OH^-(aq) E^θ = -0.88 V and AgBr(s) + e^- arrow

JEE Main 2026 Solution View → 10

For strong electrolyte Λ_ m increases slowly with dilution and can be represented by the equation Λ_ m =Λ_ m^ ∘ - Ac^ 1 / 2 Molar conductivity values of the solutions of strong

JEE Main 2026 Solution View → 11

A volume of x\,mL of 5\,M\,NaHCO_3 solution was mixed with 10\,mL of 2\,M\,H_2CO_3 solution to make an electrolytic buffer. If the same buffer was used in the following

JEE Main 2026 Solution View → 12

Consider the following redox reaction taking place in acidic medium BH_ 4 ^ - (a q)+ClO_ 3 ^ - (a q) H_ 2 BO_ 3 ^ - (a q)+Cl^ - (a q) If the Nernst equation for the above balanced

JEE Main 2026 Solution View → 13

Molar conductivity of a weak acid HQ of concentration 0.18 M was found to be 1 / 30 of the molar conductivity of another weak acid HZ with concentration of 0.02 M. If λ^ ∘ Q^

JEE Main 2026 Solution View → 14

Electricity is passed through an acidic solution of Cu^ 2+ till all the Cu^ 2+ was exhausted, leading to the deposition of 300 mg of Cu metal. However, a current of 600 mA was

JEE Main 2026 Solution View → 15

Consider the above electrochemical cell where a metal electrode (M) is undergoing redox reaction by forming M^ + (M arrow M^ + +e^ - ) . The cation M^ + is present in two

JEE Main 2026 Solution View → 16

In the given electrochemical cell, Ag(s)|AgCl(s)| FeCl_ 2 (aq), FeCl_ 3 (aq) Pt(s) at 298 K, the cell potential (E_ cell ) will increase when : A. Concentration of Fe^ 2+ is

JEE Main 2026 Solution View → 17

Consider the following reduction processes : Al^ 3+ +3 e^ - Al(s), E^ 0 =-1.66 ~V Fe^ 3+ +e^ - Fe^ 2+ , E^ 0 =+0.77 ~V Co^ 3+ +e^ - Co^ 2+ , E^ 0 =+1.81 ~V Cr^ 3+ +3 e^ - Cr(s)

JEE Main 2026 Solution View → 18

Consider the following electrochemical cell : Pt|O_ 2 ( g)(1 bar)| HCl(aq) \| M^ 2+ (aq, 1.0 M) M( s) The pH above which, oxygen gas would start to evolve at anode is \_\_\_\_

JEE Main 2026 Solution View → 19

Consider the following electrochemical cell at 298 K Pt|HSnO_ 2 ^ - (aq)| Sn(OH)_ 6 ^ 2- (aq)|OH^ - (aq)| Bi_ 2 O_ 3 (~s) Bi(s) . If the reaction quotient at a given time is 10^ 6

JEE Main 2026 Solution View → 20

For a closed circuit Daniell cell, which of the following plots is the accurate one at a given temperature?

JEE Main 2026 Solution View → 21

MX is a sparingly soluble salt that follows the given solubility equilibrium at 298 K. MX(s) leftharpoons M^ + (aq)+X^ - (aq) ; K_ sp =10^ -10 If the standard reduction potential

JEE Main 2026 Solution View → 22

The pH and conductance of a weak acid (HX) was found to be 5 and 4 × 10^ -5 ~S , respectively. The conductance was measured under standard condition using a cell where the

JEE Main 2026 Solution View → 23

In an electrochemicalcell, dichromate ions in aqueous acidic medium are reduced to Cr^ 3+ . The current (in amperes) that flows through the cell for 48.25 minutes to produce 1

JEE Advanced 2025 Solution View → 24

An electrochemical cell is fueled by the combustion of butane at 1 bar and 298 K . Its cell potential is X F × 10^3 volts, where F is the Faraday constant. The value of X is . Use

JEE Advanced 2025 Solution View → 25

Consider the following half cell reaction Cr_2 O_7^ 2- (aq)+6 e^ - +14 H^ + (aq) arrow 2 Cr^ 3+ (aq)+7 H_2 O(l) The reaction was conducted with the ratio of [Cr^ 3+ ]^2 [Cr_2 O_7^

JEE Main 2025 Solution View → 26

Given below are two statements : 1 M aqueous solution of each of Cu(NO_3)_2, AgNO_3 , Hg_2(NO_3)_2 ; Mg(NO_3)_2 are electrolysed using inert electrodes, aligned & Given : E_ Ag^ +

JEE Main 2025 Solution View → 27

1 Faraday electricity was passed through Cu^ 2+ (1.5 M, 1 ~L) / Cu and 0.1 Faraday was passed through Ag^ + (0.2 M, 1 ~L) / Ag electrolytic cells. After this the two cells were

JEE Main 2025 Solution View → 28

Given below are two statements : Statement I : Mohr's salt is composed of only three types of ions-ferrous, ammonium and sulphate. Statement II : If the molar conductance at

JEE Main 2025 Solution View → 29

The molar conductance of an infinitely dilute solution of ammonium chloride was found to be 185 ~S ~cm^2 ~mol^ -1 and the ionic conductance of hydroxyl and chloride ions are 170

JEE Main 2025 Solution View → 30

On charging the lead storage battery, the oxidation state of lead changes from x_1 to y_1 at the anode and from x_2 to y_2 at the cathode. The values of x_1, y_1, x_2, y_2 are

JEE Main 2025 Solution View → 31

The standard cell potential (E_ cell ^ ) of a fuel cell based on the oxidation of methanol in air that has been used to power television relay station is measured as 1.21 V. The

JEE Main 2025 Solution View → 32

40 mL of a mixture of CH_3 COOH and HCl (aqueous solution) is titrated against 0.1 M NaOH solution conductometrically. Which of the following statement is correct?

JEE Main 2025 Solution View → 33

Correct order of limiting molar conductivity for cations in water at 298 K is :

JEE Main 2025 Solution View → 34

0.2 \%(w / v) solution of NaOH is measured to have resistivity 870.0 ~m Ω ~m . The molar conductivity of the solution will be ______ × 10^2 mS dm ^2 ~mol^ -1 . (Nearest integer)

JEE Main 2025 Solution View → 35

Consider the following electrochemical cell at standard condition. aligned & Au(s)|QH_2, Q| NH_4 X(0.01 M)| | Ag^ + (1 M) Ag(s) & E_ cell =+0.4 V aligned \)The couple \(QH_2 / Q\)

JEE Main 2025 Solution View → 36

O_2 gas will be evolved as a product of electrolysis of : (A) an aqueous solution of AgNO_3 using silver electrodes. (B) an aqueous solution of AgNO_3 using platinum electrodes.

JEE Main 2025 Solution View → 37

Match List - I with List - II : \( array llll & - I & - II & Applications & Batteries / Cell (A) & Transistors & (I) Anode -Zn / Hg ; Cathode -HgO+C (B) & Hearing aids & (II)

JEE Main 2025 Solution View → 38

The molar conductivity of a weak electrolyte when plotted against the square root of its concentration, which of the following is expected to be observed ?

JEE Main 2025 Solution View → 39

The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidising capacity.

JEE Main 2025 Solution View → 40

For a \(Mg|Mg^ 2+ (aq)||Ag^ + (aq)| Ag\) the correct Nernst Equation is :

JEE Main 2025 Solution View → 41

Electrolysis of 600 mL aqueous solution of NaCl for 5 min changes the pH of the solution to 12 . The current in Amperes used for the given electrolysis is ____. (Nearest integer).

JEE Main 2025 Solution View → 42

Given below is the plot of the molar conductivity vs concentration for KCl in aqueous solution. If, for the higher concentration of KCl solution, the resistance of the

JEE Main 2025 Solution View → 43

Based on the data given below : array ll E_ Cr_2 O_7^ 2- / Cr^ 3+ ^ ∘ =1.33 ~V & E_ Cl_2 / Cl^ (-) ^ ∘ =1.36 ~V E_ MnO_4^ - / Mn^ 2+ ^ ∘ =1.51 ~V & E_ Cr^ 3+ / Cr ^ ∘ =-0.74 ~V

JEE Main 2025 Solution View → 44

For the given cell Fe^ 2+ _ (aq) +Ag^ + _ (aq) arrow Fe_ (aq) ^ 3+ +Ag_ (s) The standard cell potential of the above reaction is Given: array lr Ag^ + +e^ - arrow Ag & E^θ=xV Fe^

JEE Main 2025 Solution View → 45

Standard electrode potentials for a few half cells are mentioned below : aligned & E_ Cu^ 2+ / Cu ^ ∘ =0.34 ~V, E_ Zn^ 2+ / Zn ^ ∘ =-0.76 ~V & E_ Ag^ + / Ag ^ ∘ =0.80 ~V, E_ Mg^

JEE Main 2025 Solution View → 46

FeO_4^ 2- +2.0 v Fe^ 3+ 0.8 v Fe^ 2+ -0.5 v Fe^0 In the above diagram, the standard electrode potentials are given in volts (over the arrow). The value of E_ FeO_4^ 2- / Fe^ 2+ ^

JEE Main 2025 Solution View → 47

Given below are two statements : Statement (I) : Corrosion is an electrochemical phenomenon in which pure metal acts as an anode and impure metal as a cathode. Statement (II)

JEE Main 2025 Solution View → 48

A solution of aluminium chloride is electrolysed for 30 minutes using a current of 2 A . The amount of the aluminium deposited at the cathode is [Given : molar mass of aluminium

JEE Main 2025 Solution View → 49

An aqueous solution of hydrazine (N_2 H_4) is electrochemically oxidized by O_2 , thereby releasing chemical energy in the form of electrical energy. One of the products generated

JEE Advanced 2024 Solution View → 50

In a conductometric titration, small volume of titrant of higher concentration is added stepwise to a larger volume of titrate of much lower concentration, and the conductance is

JEE Advanced 2024 Solution View → 51

Which out of the following is a correct equation to show change in molar conductivity with respect to concentration for a weak electrolyte, if the symbols carry their usual

JEE Main 2024 Solution View → 52

Match List I with List II \( List - I (Cell) List - II (Use/Property/Reaction) A. Leclanche cell I. Converts energy of combustion into electrical energy B. Ni-Cd cell II. Does not

JEE Main 2024 Solution View → 53

The molar conductivity for electrolytes \(A\) and \(B\) are plotted against \(C^ 1 / 2 \) as shown below. Electrolytes \(A\) and \(B\) respectively are :

JEE Main 2024 Solution View → 54

The standard reduction potentials at \(298 ~K\) for the following half cells are given below : \( array ll Cr_2 O_7^ 2- +14 H^ + +6 e^ - arrow 2 Cr^ 3+ +7 H_2 O, E^ ∘ =1.33 ~V Fe^

JEE Main 2024 Solution View → 55

The emf of cell Tl \(| (0.001 M) Tl^ + || (0.01 M) Cu^ 2+ | Cu\) is \(0.83 ~V\) at \(298 ~K\). It could be increased by :

JEE Main 2024 Solution View → 56

The reaction; \((1)/(2) H_ 2(~g) +AgCl_ (s) arrow H_ (aq) ^ + +Cl_ (aq) ^ - +Ag_ (s) \) occurs in which of the following galvanic cell :

JEE Main 2024 Solution View → 57

How can an electrochemical cell be converted into an electrolytic cell?

JEE Main 2024 Solution View → 58

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

JEE Main 2024 Solution View → 59

The quantity of silver deposited when one coulomb charge is passed through \(AgNO_3\) solution :

JEE Main 2024 Solution View → 60

For the electro chemical cell \( gathered If E_ (M^ 2+ / M) ^0=0.46 V and E_ (x / X^ 2- ) ^0=0.34 V . gathered \) Which of the following is correct?

JEE Main 2024 Solution View → 61

The reaction at cathode in the cells commonly used in clocks involves.

JEE Main 2024 Solution View → 62

Molar ionic conductivities of divalent cation and anion are \(57 ~S ~cm^ 2 ~mol^ -1 \) and \(73 ~S ~cm^ 2 ~mol^ -1 \) respectively. The molar conductivity of solution of an

JEE Main 2024 Solution View → 63

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

JEE Main 2024 Solution View → 64

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

JEE Main 2024 Solution View → 65

What pressure (bar) of \(H_2\) would be required to make emf of hydrogen electrode zero in pure water at \(25^ ∘ C\) ?

JEE Main 2024 Solution View → 66

One of the commonly used electrode is calomel electrode. Under which of the following categories, calomel electrode comes?

JEE Main 2024 Solution View → 67

The amount of electricity in Coulomb required for the oxidation of 1mol of H _ 2 O to O _ 2 is ______ × 10 ^ 5 C .

JEE Main 2024 Solution View → 68

Consider the following redox reaction: MnO _ 4 ^ - + H ^ + + H _ 2 C _ 2 O _ 4 ⇌ Mn ^ 2 + + H _ 2 O + CO _ 2 The standard reduction potentials are given as below ( E _ red °) E ^

JEE Main 2024 Solution View → 69

The potential for the given half cell at 298K is (-) ............ × 10 ^ - 2 V . 2 H _ ( aq ) ^ + + 2 e ^ - → H _ 2 ( g ) [ H ^ + ] = 1M, P _ H _ 2 = 2atm (Given 2 . 303RT / F = 0

JEE Main 2024 Solution View → 70

The values of conductivity of some materials at 298 .15 K in Sm ^ - 1 are 2 .1 × 10 ^ 3 , 1 .0 × 10 ^ - 16 , 1 .2 × 10, 3 .91 , 1 .5 × 10 ^ - 2 , 1 × 10 ^ - 7 , 1 .0 × 10 ^ 3 .

JEE Main 2024 Solution View → 71

The metals that are employed in the battery industries are A. Fe, B. Mn, C. Ni, D. Cr, E. Cd Choose the correct answer from the options given below:

JEE Main 2024 Solution View → 72

Identify the factor from the following that does not affect electrolytic conductance of a solution.

JEE Main 2024 Solution View → 73

One Faraday of electricity liberates x × 10 ^ – 1 gram atom of copper from copper sulphate, x is______.

JEE Main 2024 Solution View → 74

Reduction potential of ions are given below: ClO _ 4 ^ - IO _ 4 ^ - BrO _ 4 ^ - E ° = 1 . 19V; E ° = 1 . 65V; E ° = 1 . 74V The correct order of their oxidising power is:

JEE Main 2024 Solution View → 75

A constant current was passed through a solution of AuCl _ 4 ^ - ion between gold electrodes. After a period of 10 . 0 minutes, the increase in mass of cathode was 1 . 314g . The

JEE Main 2024 Solution View → 76

The mass of zinc produced by the electrolysis of zinc sulphate solution with a steady current of 0 . 015A for 15 minutes is _ ___ × 10 ^ - 4 g . (Atomic mass of zinc = 65 . 4amu )

JEE Main 2024 Solution View → 77

Which of the following statements is not correct about rusting of iron?

JEE Main 2024 Solution View → 78

The hydrogen electrode is dipped in a solution of pH = 3 at 25 ° C . The potential of the electrode will be - ______ × 10 ^ - 2 V . ((2 . 303RT)/(F) = 0 . 059V) Round off the

JEE Main 2024 Solution View → 79

The mass of silver (Molar mass of Ag: 108 gmol ^ - 1 ) displaced by a quantity of electricity which displaces 5600mL of O _ 2 at S.T.P. will be _____ g.

JEE Main 2024 Solution View → 80

Plotting 1 / Λ _ m against cΛ _ m for aqueous solutions of a monobasic weak acid ( HX ) resulted in a straight line with y - axis intercept of P and slope of S . The ratio P / S

JEE Advanced 2023 Solution View → 81

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

JEE Main 2023 Solution View → 82

At 298K , the standard reduction potential for Cu ^ 2 + / Cu electrode is 0 . 34V . Given : K _ sp Cu ( OH ) _ 2 = 1 × 10 ^ - 20 Take (2 . 303RT)/(F) = 0 . 059V The reduction

JEE Main 2023 Solution View → 83

A metal surface of 100 cm ^ 2 area has to be coated with nickel layer of thickness 0 . 001mm . A current of 2A was passed through a solution of Ni ( NO _ 3 ) _ 2 for ‘ x ’ seconds

JEE Main 2023 Solution View → 84

For lead storage battery pick the correct statements A. During charging of battery, PbSO _ 4 on anode is converted into PbO _ 2 B. During charging of battery, PbSO _ 4 on cathode

JEE Main 2023 Solution View → 85

The number of correct statements from the following is........... A. E _ cell is an intensive parameter B. A negative E ^ o means that the redox couple is a stronger reducing

JEE Main 2023 Solution View → 86

In an electrochemical reaction of lead, at standard temperature, if E _ ( Pb ^ 2 + / Pb) ^ o = mVolt and E _ ( Pb ^ 4 + / Pb) ^ o = nVolt, then the value of E ° ( Pb ^ 2 + / Pb ^

JEE Main 2023 Solution View → 87

The specific conductance of 0 . 0025M acetic acid is 5 × 10 ^ - 5 S cm ^ - 1 at a certain temperature. The dissociation constant of acetic acid is ___________ × 10 ^ - 7 .(Nearest

JEE Main 2023 Solution View → 88

The reaction occurs in which of the given galvanic cell? (1)/(2) H _ 2 ( g ) + AgCl ( s ) ⇌ H ^ + ( aq ) + Cl ^ - ( aq ) + Ag ( s )

JEE Main 2023 Solution View → 89

The product, which is not obtained during the electrolysis of brine solution is

JEE Main 2023 Solution View → 90

The standard reduction potentials at 295K for the following half cells are given below: NO _ 3 ^ - + 4 H ^ + + 3 e ^ - → NO(g) + 2 H _ 2 O E ^ o = 0 . 97V V ^ 2 + (aq) + 2 e ^ - →

JEE Main 2023 Solution View → 91

The standard electrode potential of M ^ + / M in aqueous solution does not depend on

JEE Main 2023 Solution View → 92

1 × 10 ^ - 5 M AgNO _ 3 is added to 1L of saturated solution of AgBr . The conductivity of this solution at 298K is _______ × 10 ^ - 8 S m ^ - 1 . [Given : K _ sp ( AgBr ) = 4 . 9

JEE Main 2023 Solution View → 93

At what pH , given half cell MnO _ 4 ^ - ( 0 . 1M ) ∣ Mn ^ 2 + ( 0 . 001M ) will have electrode potential of 1 . 282V ? (Nearest Integer) Given E _ MnO _ 4 ^ - / Mn ^ 2 + ^ o = 1

JEE Main 2023 Solution View → 94

The resistivity of a 0 . 8M solution of an electrolyte is 5 × 10 ^ - 3 Ωcm . Its molar conductivity is 10 ^ 4 Ω ^ - 1 cm ^ 2 mol ^ - 1 . (Nearest integer)

JEE Main 2023 Solution View → 95

Which one of the following statements is correct for electrolysis of brine solution?

JEE Main 2023 Solution View → 96

The logarithm of equilibrium constant for the reaction Pd ^ 2 + + 4 Cl ^ - ⇌ PdCl _ 4 ^ 2 - is (Nearest integer) Given: (2 . 303RT)/(F) = 0 . 06V Pd _ ( aq ) ^ 2 + + 2 e ^ - ⇌ Pd

JEE Main 2023 Solution View → 97

The electrode potential of the following half cell at 298K X| X ^ 2 + (0 . 001M) ‖ Y ^ 2 + (0 . 01M)|Y is _____ × 10 ^ - 2 V (Nearest integer) Given : E _ X ^ 2 + ∣ X ^ 0 = - 2 .

JEE Main 2023 Solution View → 98

Consider the cell Pt _ (s) | H _ 2 (g, 1atm)| H ^ + (aq, 1M) | | Fe ^ 3 + (aq), Fe ^ 2 + (aq)| Pt (s) When the potential of the cell is 0 . 712V at 298K , the ratio [ Fe ^ 2 + ] /

JEE Main 2023 Solution View → 99

The equilibrium constant for the reaction Zn(s) + Sn ^ 2 + (aq) ⇌ Zn ^ 2 + (aq) + Sn(s) is 1 × 10 ^ 20 at 298K . The magnitude of standard electrode potential of Sn / Sn ^ 2 + if

JEE Main 2023 Solution View → 100

The standard electrode potential ( M ^ 3 + / M ^ 2 + ) for V, Cr, Mn & Co are - 0 . 26V, - 0 . 41V, + 1 . 57V and + 1 . 97V , respectively. The metal ions which can liberate H _ 2

JEE Main 2023 Solution View → 101

Following figure shows dependence of molar conductance of two electrolytes on concentration. Λ _ m ^ 0 is the limiting molar conductivity. The number of Incorrect statement(s)

JEE Main 2023 Solution View → 102

Pt ( s ) H _ 2 ( g ) ( 1bar ) | H ^ + ( aq ) ( 1M )|| M ^ 3 + ( aq ) , M ^ + ( aq )|Pt ( s ) The E _ cell for the given cell is 0 . 1115V at 298K When [ M ^ + ( aq )] [ M ^ 3 + (

JEE Main 2023 Solution View → 103

Consider the cell Pt ( s ) | H _ 2 ( s ) ( latm )| H ^ + (aq, [ H ^ + ] = 1) | | Fe ^ 3 + ( aq ) , Fe ^ 2 + ( aq ) ∣ Pt ( s ) Given: E _ Fe ^ 3 + / Fe ^ 2 + ° = 0 . 771V and E _ H

JEE Main 2023 Solution View → 104

At 298K , a 1 litre solution containing 10mmol of Cr _ 2 O _ 7 ^ 2 - and 100mmol of Cr ^ 3 + shows a pH of 3 . 0 . Given : Cr _ 2 O _ 7 → 2 - Cr ^ 3 + ; E ^ 0 = 1 . 330V and (2 .

JEE Main 2023 Solution View → 105

Consider the strong electrolytes Z _ m X _ n , U _ m Y _ p and V _ m X _ n . Limiting molar conductivity of U _ m Y _ p and V _ m X _ n are 250 and 440S cm ^ 2 mol ^ - 1

JEE Advanced 2022 Solution View → 106

The reduction potential ( E ^ 0 ), in V) of MnO _ 4 ^ - (aq) / Mn(s) is [Given: E _ ( MnO _ 4 ^ - (aq) / MnO _ 2 (s)) ^ o = 1 . 68V; E _ ( MnO _ 2 (s) / Mn ^ 2 + (aq)) ^ o = 1 .

JEE Advanced 2022 Solution View → 107

For a cell, Cu(s) Cu ^ 2 + (0 . 001M ) | Ag ^ + (0 . 01M)|Ag(s))the cell potential is found to be 0 . 43V at 298K . The magnitude of standard electrode potential for Cu ^ 2 + | Cu

JEE Main 2022 Solution View → 108

Resistance of a conductivity cell (cell constant 129 m ^ - 1 ) filled with 74 . 5ppm solution of KCl is 100Ω (labelled as solution 1 ). When the same cell is filled with KCl

JEE Main 2022 Solution View → 109

Match List-I with List-II. List-I List-II A Cd(s) + 2Ni (OH) _ 3 (s) → CdO(s) + 2Ni (OH) _ 2 (s) + H _ 2 O(l) I Primary battery B Zn(Hg) + HgO(s) → ZnO(s) + Hg(l) II Discharging

JEE Main 2022 Solution View → 110

Given below are two statements: Statement I: For KI , molar conductivity increases steeply with dilution. Statement II: For carbonic acid, molar conductivity increases slowly with

JEE Main 2022 Solution View → 111

The amount of charge in F (Faraday) required to obtain one mole of iron from Fe _ 3 O _ 4 is ______. (Round off the answer to the nearest integer)

JEE Main 2022 Solution View → 112

The molar conductivity of a conductivity cell filled with 10 moles of 20mLNaCl solution is Λ _ m1 and that of 20 moles another identical cell heaving 80mLNaCl solution is Λ _ m2

JEE Main 2022 Solution View → 113

The cell potential for Zn| Zn ^ 2 + ( aq ) ‖ Sn ^ x + |Sn is 0 . 801V at 298K . The reaction quotient for the above reaction is 10 ^ - 2 . The number of electrons involved in the

JEE Main 2022 Solution View → 114

The cell potential for the given cell at 298KPt| H _ 2 (g, 1bar)|| H ^ + (aq) ‖ Cu ^ 2 + (aq)|Cu(s) is 0 . 31V . The pH of the acidic solution is found to be 3 , whereas the

JEE Main 2022 Solution View → 115

A dilute solution of sulphuric acid is electrolysed using a current of 0 . 10A for 2 hours to produce hydrogen and oxygen gas. The total volume of gases produced at STP is cm ^ 3

JEE Main 2022 Solution View → 116

For the given reactions Sn ^ 2 + + 2 e ^ - → Sn Sn ^ 4 + + 4 e ^ - → Sn the electrode potentials are ; E _ Sn ^ 2 + / Sn ^ ° = - 0 . 140V and E _ Sn ^ 4 + / Sn ^ ° = 0 . 010V .

JEE Main 2022 Solution View → 117

The solubility product of a sparingly soluble salt A _ 2 X _ 3 is 1 . 1 × 10 ^ - 23 . If specific conductance of the solution is 3 × 10 ^ - 5 Sm ^ - 1 , the limiting molar

JEE Main 2022 Solution View → 118

The quantity of electricity in Faraday needed to reduce 1mol of Cr _ 2 O _ 7 ^ 2 - to Cr ^ 3 + is

JEE Main 2022 Solution View → 119

In 3d series, the metal having the highest M ^ 2 + / M standard electrode potential is

JEE Main 2022 Solution View → 120

For the reaction taking place in the cell: Pt(s) H _ 2 (g) H ^ + (aq)|| Ag ^ + (aq)|Ag(s)) E _ cell ^ ° = + 0 . 5332V . The value of Δ _ f G ^ ⊖ is kJmol ^ - 1 . (in nearest

JEE Main 2022 Solution View →
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