JEE Main PYQs — Electrochemistry

40 mL of a mixture of CH3COOH and HCl (aqueous solution) is titrated against 0.1 M NaOH solution conductometrically. Which of the following statement is correct?

The standard cell potential (Ecell) 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 standard half cell…

The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidising capacity. (a) ESn4+/Sn2+ = +1.15 V (b) ETl3+/Tl = +1.26 V (c)…

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?

For a Mg | Mg2+(aq) || Ag+(aq) | Ag cell, the correct Nernst Equation is:

Match List-I with List-II: List-I (Applications) | List-II (Batteries/Cell) (A) Transistors | (I) Anode – Zn/Hg; Cathode – HgO + C (B) Hearing aids | (II) Hydrogen fuel cell (C) Invertors | (III)…

O2 gas will be evolved as a product of electrolysis of: (A) an aqueous solution of AgNO3 using silver electrodes. (B) an aqueous solution of AgNO3 using platinum electrodes. (C) a dilute solution of…

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 conductan at infinite dilution of…

For the given cell: {Fe}^{2+}({eq}) + {Ag}^+({aq}) {Fe}^{3+}({aq}) + {Ag}(s) The standard cell potential of the above reaction is: Given: - Ag+ + e- Ag; E0 = x\,V - Fe2+ + 2e- Fe; E0 = y\,V - Fe3+ +…

Reduction potential of ions are given below: | Ion | ClO4- | IO4- | BrO4- | |---|---|---|---| | E° (V) | 1.19 | 1.65 | 1.74 | The correct order of their oxidising power is:

The quantity of silver deposited when one coulomb charge is passed through AgNO3 solution:

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:

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

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

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

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…

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

For the electrochemical cell, if E°(M2+/M) = 0.46\ V and E°(X/X2-) = 0.34\ V. Which of the following is correct?

The emf of cell Tl(0.001\ M)Tl+(0.01\ M)Cu2+Cu is 0.83 V at 298 K. It could be increased by:

What pressure (bar) of H2 would be required to make emf of hydrogen electrode zero in pure water at 25°C?

Fuel cell, using hydrogen and oxygen as fuels, A. has been used in spa B. has an efficiency of 40% to produ electricity C. uses aluminum as catalysts D. is eco-friendly E. is actually a type of…

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

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

Molar ionic conductivities of divalent cation and anion are 57\ S\ cm2\ mol-1 and 73\ S\ cm2\ mol-1 respectively. The molar conductivity of solution of an electrolyte with the above cation and anion…

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 meaning:

The reaction: {1}{2}{H_{2(g)}} + {AgCl_{(s)}} {H^+_{(aq)}} + {Cl^-_{(aq)}} + {Ag_{(s)}} occurs in which of the following galvanic cell:

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 for electrolytes A and B are plotted against C1/2 as shown below. Electrolytes A and B respectively are:

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

The standard electrode potential (M3+/M2+) 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 H2 from a dilute acid are

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

The reaction occurs in which of the given galvanic cell? {1}{2}{H_2(g)} + {AgCl(s)} {H^+(aq)} + {Cl^-(aq)} + {Ag(s)}

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

For lead storage battery pick the correct statements: A. During charging, PbSO4 on anode is converted into PbO2 B. During charging, PbSO4 on cathode is converted into PbO2 C. Lead storage battery…

The correct order of reduction potentials of the following pairs is | Label | Half-cell | |---|---| | A | Cl2/Cl- | | B | I2/I- | | C | Ag+/Ag | | D | Na+/Na | | E | Li+/Li | Choose the correct…

In 3d series, the metal having the highest M2+/M standard electrode potential is

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 dilution. In the…

In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?

The ( E T)P of different types of half cells are as follows: | Half cell | A | B | C | D | |---|---|---|---|---| | ( E T)P | 1 10-4 | 2 10-4 | 0.1 10-4 | 0.2 10-4 | (Where E is the electromotive…

Match List-I with List-II. List-I | | Reaction | |---|---| | A | Cd(s) + 2Ni(OH)3(s) CdO(s) + 2Ni(OH)2(s) + H2O(l) | | B | Zn(Hg) + HgO(s) ZnO(s) + Hg(l) | | C | 2PbSO4(s) + 2H2O(l) Pb(s) + PbO2(s) +…

The molar conductivity of a conductivity cell filled with 10 moles of 20 mL NaCl solution is m1 and that of 20 moles of another identical cell having 80 mL NaCl solution is m2. The conductivities…

Given below are two statements: Statement I: The limiting molar conductivity of KCl (strong electrolyte) is higher compared to that of CH3COOH (weak electrolyte). Statement II: Molar conductivity…

Match List-I with List-II: | List-I (Parameter) | | List-II (Unit) | |---|---|---| | (a) Cell constant | | (i) S\ cm2\ mol-1 | | (b) Molar conductivity | | (ii) Dimensionless | | (c) Conductivity | |…

For the given cell: {Cu(s)|Cu^{2+}(C_1\ M)\|Cu^{2+}(C_2\ M)|Cu(s)} change in Gibbs energy ( G) is negative, if:

The variation of molar conductivity with concentration of an electrolyte (X) in aqueous solution is shown in the given figure. The electrolyte X is:

The equation that is incorrect is:

Amongst the following, the form of water with the lowest ionic conductan at 298 K is:

E°Cu2+/Cu = +0.34\ V; E°Zn2+/Zn = -0.76\ V Identify the incorrect statement from the options below for the above cell:

Given that the standard potentials (E°) of Cu2+/Cu and Cu+/Cu are 0.34 V and 0.522 V respectively, the E° of Cu2+/Cu+ is:

250 mL of a waste solution obtained from the workshop of a goldsmith contains 0.1 M AgNO3 and 0.1 M AuCl. The solution was electrolyzed at 2 V by passing a current of 1 A for 15 minutes. The…

Let CNaCl and CBaSO4 be the conductan (in S) measured for saturated aqueous solutions of NaCl and BaSO4 respectively, at a temperature T. Which of the following is false?

A solution of Ni(NO3)2 is electrolyzed between platinum electrodes using 0.1 Faraday electricity. How many mole of Ni will be deposited at the cathode?

For the cell Zn(s)|Zn2+(aq)\|Mx+(aq)|M(s), different half cells and their standard electrode potentials are given below: | Mx+(aq)/M(s) | Au3+(aq)/Au(s) | Ag+(aq)/Ag(s) | Fe3+(aq)/Fe2+(aq) |…

The decreasing order of electrical conductivity of the following aqueous solutions is: (A) 0.1 M Formic acid, (B) 0.1 M A acid, (C) 0.1 M Benzoic acid.

The standard Gibbs energy for the given cell reaction in kJ\ mol-1 at 298 K is: {Zn(s) + Cu^{2+}(aq) Zn^{2+}(aq) + Cu(s)}, E° = 2\ {V} (Faraday's constant, F = 96000\ C\ mol-1)

Consider the following reduction pro: {Zn^{2+} + 2e^- Zn(s)}; E° = -0.76\ {V} {Ca^{2+} + 2e^- Ca(s)}; E° = -2.87\ {V} {Mg^{2+} + 2e^- Mg(s)}; E° = -2.36\ {V} {Ni^{2+} + 2e^- Ni(s)}; E° = -0.25\ {V}…

The standard electrode potential E° and its temperature coefficient (dEdT) for a cell are 2 V and -5 10-4\ V\ K-1 at 300 K, respectively. The reaction is Zn(s) + Cu2+(aq) Zn2+(aq) + Cu(s). The…

The anodic half-cell of lead-acid battery is recharged using electricity of 0.05 Faraday. The amount of PbSO4 electrolyzed in g during the pro is: (Molar mass of PbSO4 = 303\ g\ mol-1)

Given the equilibrium constant KC of the reaction: {Cu(s) + 2Ag^+(aq) Cu^{2+}(aq) + 2Ag(s)} is 10 1015, calculate the E°cell of this reaction at 298 K. [2.303RTF at 298\ K = 0.059\ V]

Which one of the following graphs between molar conductivity (m) versus C is correct?

m0 for NaCl, HCl and NaA are 126.4, 425.9 and 100.5\ S\ cm2\ mol-1 respectively. If the conductivity of 0.001 M HA is 510-5\ S\ cm-1, of dissociation of HA is

Consider the statements S1 and S2: S1: Conductivity always increases with decrease in the concentration of electrolyte. S2: Molar conductivity always increases with decrease in the concentration of…

If the standard electrode potential for a cell is 2 V at 300 K, the equilibrium constant (K) for the reaction Zn(s)+Cu2+(aq) Zn2+(aq)+Cu(s) at 300 K is approximately: (R=8\ J\ K-1\ mol-1, F=96000\ C\…

Calculate the standard cell potential (in V) of the cell in which the following reaction takes pla: Fe2+(aq)+Ag+(aq) Fe3+(aq)+Ag(s). Given: E°Ag+/Ag=x\ V, E°Fe2+/Fe=y\ V, E°Fe3+/Fe=z\ V

In the cell Pt(s)|H2(g,1\ bar)|HCl(aq)|AgCl(s)|Ag(s)|Pt(s), the cell potential is 0.92 V when a 10-6 molar HCl solution is used. The standard electrode potential of Ag|AgCl|Cl- electrode is \\\\.…