NEET PYQ Electrochemistry - Chapter-wise Questions with Solutions

About Electrochemistry PYQs

Electrochemistry has 865 previous year questions in the Quantrex Academy NEET UG Chemistry bank. The 220 questions in this list come from NEET (113), AIIMS (46), MHT CET Medical (34) and 1 other source, spanning 2001 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

NEET Electrochemistry PYQs with Solutions

About Electrochemistry PYQs

Questions by year (this list)

Electrochemistry questions with solutions

Calculate the conductivity of 0.025 M BaCl_2 solution if the molar conductivity of salt at 25^ ^ ∘ C is 325\ Ω^ -1 \ cm^2\ mol^ -1 .

Calculate the equilibrium constant at 25\ ^ ^ ∘ C for the cell reaction, Ni(s) + Cu^ 2+ (1M) arrow Ni^ 2+ (1M) + Cu(s) if E^ ^ ∘ _ cell is 0.592\ V .

Calculate the time required in second to deposit 5.85 g Ni from NiCl_2 solution by passing 10 A current (molar mass of Ni = 58.5\ g mol^ -1 )

Which of the following cell reactions is exhibited by fuel cell?

Which of the following types of cells is used for electroplating?

Which of the following acts as a cathode in a dry cell?

What is the Standard cell potential of a cell constituted by two electrodes, A (E^0_ A^+/A = 0.30\ V) and B (E^0_ B^+/B = +0.42\ V) ?

How long (in minutes) must a 2\ A current be passed through AgNO_3 solution to deposit 5.4\ g Ag ? [Molar mass of Ag = 108\ g mol^ -1 ]

What is the value of standard electrode potential of the standard hydrogen gas electrode?

The standard electrode potential of Zn, Ag and Cu are -0.76 , 0.80 and 0.34 volt respectively, then identify the correct statement from following.

A 0.02 M KCl solution has conductivity k=2.76×10^ -3 \ S cm^ -1 . Find molar conductivity.

The molar conductivity of 0.02 M electrolytic solution is 220\ Ω^ -1 cm^2 mol^ -1 at 25\ ^ ^ ∘ C . Find its conductivity.

The resistivity of a solution is 25.0\ Ω ·cm. Find its conductivity κ in (S cm^ -1 ).

How many Faraday electricity is required to reduce 0.25 g of Nb(V) to the metal? ( Atomic mass of Nb = 93)

Which of the following paste is used in dry cell as an electrolyte?

What is standard decrease in Gibbs energy for the following cell? Al_ (s) Al^ +3 _ (1M) ∥ Cd^ +2 _ (1M) Cd if E^ ^ ∘ \,Al^ +3 /Al = -1.66 V, E^ ^ ∘ \,Cd^ +2 /Cd = -0.40 V

Dry cell is an example of

Find the mass of Zn metal deposited at the cathode during the passage of 10 amperes current through its salt solution for 10 minutes. [ Molar mass of Zn = 65.4 g mol^ -1 & For the

Which of the following is a primary cell?

What is the cell constant of a cell containing a solution of resistance 90 Ohm with conductivity 2 × 10^ -3 \ Ohm^ -1 cm^ -1 ?

0.1 M solution of an electrolyte A^+B^- placed in a conductivity cell with electrodes 4 cm apart and each with cross-section area equal to 2\ cm^2 was found to have a resistance

Identify the correct order of increasing reducing strength of metals from following.

Find the molar conductivity of 0.001 M AgNO_3 solution if the conductivity of it is 1.2 × 10^ -4 Ω^ -1 cm^ -1 .

How is the molar conductivity of an elecrolytic solution calculated?

2MnO_ 2(s) + 2NH_4^+ + 2e^- arrow Mn_2O_ 3(s) + 2NH_ 3(aq) + H_2O_ (l) Which of the following cell exhibits above net reduction reaction?

Standard electrode potential of three metals X, Y and Z are -1.2 V, +0.5 V and -3.0 V respectively. The reducing power of these metals will be

Calculate the amount of electricity required to deposit 1 mole of aluminum from a solution of AlCl_3 .

What is the number of moles of electrons gained by n mole PbO_ 2(s) when it is converted to PbSO_ 4(s) at discharging of lead accumulator?

The molar conductivity of 0.8\ MBaCl_2 solution at 25^ ^ ∘ C is 220\ Ω^ -1 cm^2mol^ -1 . Calculate its conductivity.

Calculate the standard Gibbs energy change for the following cell Cd(s)\ |\ Cd^ ++ (1M)\ ||\ Sn^ ++ (1M)|\ Sn(s) if E^0_ cell is 0.27\ V .

The molar conductance of NaCl, HCl and CH_3COONa at infinite dilution are 126.45, 426.16 and 91.0 S cm^2\ mol^ -1 respectively. Calculate the molar conductance of CH_3COOH at

Which of the following elements has positive standard reduction potential?

Calculate the emf of the following cell at 25^ ^ ∘ C Zn(s) Zn^ ++ (0.1M) ∥ Cu^ ++ (0.05M) Cu(s) if E^ ^ ∘ cells 1.1V.

Calculate the standard Gibbs energy for the following cell reaction, A(s) + ^ 2+ (aq) arrow ^ 2+ (aq) + B(s) , if E^ ^ ∘ _ cell is 0.556\ V .

The standard electrode potential ( E^∘ ) for the half-cell reaction Fe^ 3+ +e^-arrowFe^ 2+ at 298 K is (Given: E^∘(Fe^ 3+ /Fe)=-0.04 V and E^∘(Fe^ 2+ /Fe)=-0.44 V at 298 K)

For a salt XY , which is a strong electrolyte, the plot of Λ_m versus c has a slope of -90.0 S cm ^2 mol ^ -3/2 L ^ 1/2 at 298 K. At 0.01 M concentration of XY , the value of Λ_m

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 Cu = 63 g mol ^ -1

Calculate emf of the half cell given below : Pt (s) | H_2 (g, 2 atm) | HCl (aq, 0.02 M) E^ ∘ _ H_2/H^ + = 0 V (Given: (2.303\ RT)/(F) = 0.059, 2 = 0.3010)

If the molar conductivity (Λ_ m ) of a 0.050 ~mol ~L^ -1 solution of a monobasic weak acid is 90 ~S ~cm^2 ~mol^ -1 , its extent (degree) of dissociation will be [Assume Λ_ + ^ ∘

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 Cu: 63 ~g ~mol^ -1

From the following select the one which is not an example of corrosion.

The standard cell potential of the following cell Zn|Zn^ 2+ (aq)| Fe^ 2+ (aq) Fe is 0.32 V . Calculate the standard Gibbs energy change for the reaction : Zn(s)+Fe^ 2+ (aq) arrow

Molar conductance of an electrolyte increases with dilution according to the equation: Λ_ m =Λ_ m ^ ∘ -A c Which of the following statements are true? (A) This equation applies to

The correct value of cell potential in volt for the reaction that occurs when the following two half cells are connected, is aligned & Fe_ (aq) ^ 2+ +2 e^ - arrow Fe(s), E^ ∘

The E^ values for aligned & Al^ + / Al=+0.55 V and Tl^ + / TI=-0.34 V & Al^ 3+ / Al=-1.66 V and Tl^ 3+ / TI=+1.26 V aligned Identify the incorrect statement.

The conductivity of centimolar solution of KCl at 25 ° C is 0 . 0210 ohm ^ - 1 cm ^ - 1 and the resistance of the cell containing the solution at 25 ° C is 60ohm . The value of

Two half cell reactions are given below : CO^ 3+ +e^ - arrow Co^ 2+ , E^ ∘ Co^ 2+ / Co^ 3+ =-1.81 ~V 2 Al^ 3+ +6 e^ - arrow 2 Al(s), E^ o Al / Al^ 3+ =+1.66 ~V The standard EMF of

Given below are half cell reactions : MnO _ 4 ^ - + 8 H ^ + + 5 e ^ - → Mn ^ 2 + + 4 H _ 2 O , E _ Mn ^ 2 + / MnO _ 4 ^ - ^ o = - 1 . 510V (1)/(2) O _ 2 + 2 H ^ + + 2 e ^ - → H _

At 298K , the standard electrode potentials of Cu ^ 2 + / Cu, Zn ^ 2 + / Zn, Fe ^ 2 + / Fe and Ag ^ + / Ag are 0 . 34V , - 0 . 76V , - 0 . 44V and 0 . 80V , respectively. On the

Find the emf of the cell in which the following reaction takes place at 298K Ni ( s ) + 2 Ag ^ + ( 0 . 001M ) → Ni ^ 2 + ( 0 . 001M ) + 2Ag ( s ) (Given that E ° _ cell = 1 . 05V

Standard electrode potential for the cell with cell reaction Zn(s)+Cu^ 2+ (aq) Zn^ 2+ (aq)+Cu(s) is 1.1 ~V . Calculate the standard gibbs energy change for the cell reaction.

The molar conductance of NaCl, HCl and CH _ 3 COONa at infinite dilution are 126 . 45, 426 . 16 and 91 . 0 Scm ^ 2 mol ^ - 1 respectively. The molar conductance of CH _ 3 COOH at

The molar conductivity of 0 . 007M acetic acid is 20S cm ^ 2 mol ^ - 1 . What is the dissociation constant of acetic acid? Choose the correct option. λ _ H ^ + ^ ∘ = 350S cm ^ 2

Identify the reaction from following having top position in EMF series (Std.red. potential) according to their electrode potential at 298K .

The number of Faradays(F) required to produce 20g of calcium from molten CaCl _ 2 (Atomic mass of Ca = 40g mol ^ – 1 ) is

In a typical fuel cell, the reactants (R) and product (P) are :-

Calculate emf of the following cell at 25^ ∘ C if value of E_ cell ^ ∘ is 4 ~V (Given R T / F 10=0.06 ) : M|M_ (0.01 M) ^ 2+ ||M_ (0.0001 M) ^ 2+ | M

. Given, E_ Cr^ 3+ / Cr ^0=-0.72 ~V, E_ fe^ 2+ / Fe =-0.42 ~V . The potential for the cell Cr Cr^ 3+ (0.1 M) \| Fe^ 2+ (0.01 M) Fe is

The standard electrode potential (E^ - ) values of (Al^ 3+ / Al, Ag^ + / Ag, K^ + / K. and Cr^ 3+ / Cr are -1.66 ~V, 0.80 ~V, 2.93 ~V and -0.74 ~V , respectively. The correct

Following limiting molar conductivities are given as given as aligned & λ_ m(H _ 2 SO _ 4 ) ^0= x S cm ^ 2 ~mol^ -1 & λ_ m(K _ 2 SO _ 4 ) ^0= y S cm ^ 2 ~mol^ -1 & aligned λ_

For a cell involving one electron E _ cell ^ ⊝ = 0.59V at 298K , the equilibrium constant for the cell reaction is: [Giventhat(2.303RT)/(F) = 0.059VatT = 298K]

0.1 M solution is present in a conductivity cell with electrode of 100 ~cm^2 area placed 1 ~cm apart and resistance observed is 5 × 10^3 ohm . What is the molar conductivity of

Time taken to completely decompose 36 ~g of water by passing 3 ~A current is

Assertion : Reverse current flows in charging of lead storage battery. Reason : During charging, PbSO_4 converts into Pb and PbO_2 .

Assertion : Molar conductivity of a weak electrolyte at infinite dilution cannot be determined experimentally. Reason : Kohlrausch law helps to find the molar conductivity of a

Cell equation : A+2 B^ + A^ 2+ +2 B A^ 2+ +2 e^ - A ; E^ ∘ =+0.34 ~V and _ 10 K=15.6 at 300 ~K for cell reactions. Find E^ ∘ for B^ + +e^ - B . [. Given : (2.303 R T)/(n F)=0.059

Assertion : Electrolysis of NaCl_ (a q) produces Na metal. Reason : Na^ + is obtained at cathode.

For the electrochemical cell, Ag^ - |AgCl| KCl|| AgNO_3 Ag^ + , the overall cell reaction is

The product of electrolysis of aqueous NaCl solution on anode and cathode respectively is

If molar conductivity of Ca^ 2+ and Cl^ - ions are 119 and 71 Sm^2 ~mol^ -1 respectively, then the molar conductivity of CaCl_2 at infinite dilution is

If E^ ∘ (Zn^ 2+ , Zn)=-0.763 ~V and E^ ∘ (Fe^ 2+ , Fe)=-0.44 ~V , then the emf of the cell Zn|Zn^ 2+ (a=0.00 l) \| Fe^ 2+ (a=0.005)| Fe is

Consider the change in oxidation state of Bromine corresponding to different emf values, as shown in the diagram below: Then, what is the species undergoing disproportionation?

Assertion : If standard reduction potential for the reaction Ag^ + +e^ - arrow Ag is 0.80 volt, then for the reaction 2 Ag^ + +2 e^ - arrow 2 Ag , it will be 1.60 volt. Reason: If

appropriate molar conductances of the electrolytes listed in the given table at infinite dilution in H_2 O at 25^ ∘ C .

On the basis of standard electrode potential of redox couples given below, find out which of the following is the strongest oxidising agent. (E^ ∘ . values : Fe^ 3+ |Fe^ 2+ =+0.77

The standard reduction potential for Zn^ 2+ / Zn, Ni^ 2+ / Ni and Fe^ 2+ / Fe are -0.76 , -0.23 and -0.44 V , respectively. The reaction X+Y^ 2+ X^ 2+ +Y will be spontaneous when