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JEE Electrochemistry PYQs with Solutions

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

52 questionsNSECAnswers + solutions

About Electrochemistry PYQs

Electrochemistry has 52 previous year questions in the Quantrex Academy JEE Main & Advanced NSEC bank. The 52 questions in this list come from Olympiad workbook (52). Each question opens on its own page with the options, the correct answer and the worked solution where available.

Electrochemistry questions with solutions

1

NaOH solution is added dropwise to HCl solution and the conductance of the mixture is measured after addition of each drop. The variation of conductance with volume of NaOH added

Olympiad workbook Solution View → 2

Reaction E_0 / V Agarrow Ag^ + + ^ - -0.80 Cr^ 3+ +3 ^ - arrow 3 Cr -0.74 Zn^ 2+ +2 ^ - arrow Zn -0.76 I_2(~s)+2 ^ - arrow 2 I^ - 0.54 Co^ 2+ +2 ^ - arrow Co -0.28 Ni^ 2+ +2 ^

Olympiad workbook Solution View → 3

When a medal is electroplated with silver (Ag)

Olympiad workbook Solution View → 4

Given the E_0 values for the half reactions: aligned & Sn^ 4+ +2 ^ - arrow Sn^ 2+ , 0.15 ~V & 2 Hg^ 2+ +2 ^ - arrow Hg_2^ 2+ , 0.92 ~V & PbO_2+4 H^ + +2 ^ - arrow Pb^ 2+ +2 H_2 O

Olympiad workbook Solution View → 5

Reaction E_0 / V Agarrow Ag^ + + ^ - -0.80 Cr^ 3+ +3 ^ - arrow 3 Cr -0.74 Zn^ 2+ +2 ^ - arrow Zn -0.76 I_2(~s)+2 ^ - arrow 2 I^ - 0.54 Co^ 2+ +2 ^ - arrow Co -0.28 Ni^ 2+ +2 ^

Olympiad workbook Solution View → 6

Which of the following statements is not correct regarding the galvanic cells?

Olympiad workbook Solution View → 7

The standard potentials (E^ ^ ^ ∘ ) of MnO_4^ - / Mn^ 2+ and MnO_2 / Mn^ 2+ half cells in acidic medium are 1.51 V and 1.23 V respectively at 298 K . The standard potential of

Olympiad workbook Solution View → 8

The standard electrode potential (E^0) of the Daniel cell is 1.1 V and the overall cell reaction can be represented as Zn(s)+Cu^ 2+ (aq) arrow Zn^ 2+ (aq)+Cu(s) . Under which of

Olympiad workbook Solution View → 9

The standard redox potential for the reaction 2 H_2 O arrow O_2+4 H^ + +4 ^ - is -1.23 V . If the same reaction is carried out at 25^ ^ ^ ∘ C and at pH=7 , the potential will be

Olympiad workbook Solution View → 10

If the standard electrode potentials of Fe^ 3+ / Fe and Fe^ 2+ / Fe are -0.04 V and -0.44 V respectively, then that of Fe^ 3+ / Fe^ 2+ is

Olympiad workbook Solution View → 11

An electrochemical cell was constructed with Fe^ 2+ / Fe and Cd^ 2+ / Cd at 25^ ^ ^ ∘ C with initial concentrations of [Fe^ 2+ ]=0.800 M and [Cd^ 2+ ]=0.250 M . The EMF of the

Olympiad workbook Solution View → 12

A sample of water from a water tank has a resistance of 100 Ω at 298 K , when placed in a conductivity cell of cell constant 0.2 ~m^ -1 . On dissolving 58.5 g of NaCl in the water

Olympiad workbook Solution View → 13

When the pH of the system is increased by 2.0 units, maximum decrease in half cell potential for the reaction will be observed in

Olympiad workbook Solution View → 14

The correct order of the following oxidizing agents in basic aqueous medium is: array ll CrO _ 4 ^ 2- / Cr^ 3+ & E^0=- 0.11 ~V FeO _ 4 ^ 2- / Fe^ 3+ and E^0=+ 0.72 ~V MnO _ 4 ^ 2

Olympiad workbook Solution View → 15

The reaction that takes place during charging of the lead storage cell is given below 2 PbSO_4(~s)+2 H_2 O(ℓ) arrow Pb(~s)+PbO(~s)+2 H_2 SO_4(aq) If a current of 10.0 A is passed

Olympiad workbook Solution View → 16

The reduction of O_2 to H_2 O in acidic solution has a standard reduction potential of 1.23 V . If the pH of the acid solution is increased by one unit, half cell potential will

Olympiad workbook Solution View → 17

Concentration of K^ + ions inside a biological cell was found to be 25 times higher than that outside. The magnitude of the potential difference between the two sides of the cell

Olympiad workbook Solution View → 18

Three Faradays of electricity are passed through aqueous solutions of AgNO_3, NiSO_4 and CrCl_3 kept in three vessels using inert electrodes. The ratio (in moles) in which the

Olympiad workbook Solution View → 19

Electrolysis of aqueous CuSO_4(0.1 M) was carried out in two cells I and II. In I, the electrodes are of Cu and in II they were of Pt . As the electrolysis proceeds pH of the

Olympiad workbook Solution View → 20

A half-cell reaction represented by (i) as given below Fe(OH)_2(~s)+2 e^ - arrow Fe(~s)+2 OH^ - (aq) E^ =-0.9 ~V (i) takes place in two different electrochemical cells, I and II

Olympiad workbook Solution View → 21

Latimer diagrams are the compact representations of electrochemical equilibria in substances of multiple oxidation states. The value of the potential, x , in the Latimer diagram

Olympiad workbook Solution View → 22

If the ratio of the concentrations of the oxidized and reduced forms of a species in an electrochemical reaction can be given as [Ox] /[Red]=1.0 × 10^ -3 , the correct expression

Olympiad workbook Solution View → 23

The Galvanic cell can be represented as Zn / Zn^ 2+ (0.1 M) / / Cu^ 2+ (0.1 M) / Cu . Among the following, the cell that can produce an EMF more than that of the Galvanic cell is

Olympiad workbook Solution View → 24

The conductivity of 0.10 M KCl solution at 298 K is 1.29 × 10^ -2 ~S ~cm^ -1 . The resistance of this solution is found to be 28.44 Ω . Using the same cell, the resistance of 0.10

Olympiad workbook Solution View → 25

Molten NaCl is electrolysed for 35 minutes with a current of 3.50 A at 40^ ^ ^ ∘ C and 1 bar pressure. Volume of chlorine gas evolved in this electrolysis is

Olympiad workbook Solution View → 26

From the given standard electrode potentials array ll Sn^ 4+ (aq)+2 ^ - arrow Sn^ 2+ (aq) & E^0=0.15 ~V Br_2(l)+2 ^ - arrow 2 Br^ - (aq) & E^0=1.07 ~V array The approximate free

Olympiad workbook Solution View → 27

Given the E_0 values for the half reactions: aligned & Sn^ 4+ +2 ^ - arrow Sn^ 2+ , 0.15 ~V & 2 Hg^ 2+ +2 ^ - arrow Hg_2^ 2+ , 0.92 ~V & PbO_2+4 H^ + +2 ^ - arrow Pb^ 2+ +2 H_2 O

Olympiad workbook Solution View → 28

Which of the following statements is not correct regarding the galvanic cells?

Olympiad workbook Solution View → 29

NaOH solution is added dropwise to HCl solution and the conductance of the mixture is measured after addition of each drop. The variation of conductance with volume of NaOH added

Olympiad workbook Solution View → 30

Three Faradays of electricity are passed through aqueous solutions of AgNO_3, NiSO_4 and CrCl_3 kept in three vessels using inert electrodes. The ratio (in moles) in which the

Olympiad workbook Solution View → 31

The standard potentials (E^ ^ ^ ∘ ) of MnO_4^ - / Mn^ 2+ and MnO_2 / Mn^ 2+ half cells in acidic medium are 1.51 V and 1.23 V respectively at 298 K . The standard potential of

Olympiad workbook Solution View → 32

Reaction E_0 / V Agarrow Ag^ + + ^ - -0.80 Cr^ 3+ +3 ^ - arrow 3 Cr -0.74 Zn^ 2+ +2 ^ - arrow Zn -0.76 I_2(~s)+2 ^ - arrow 2 I^ - 0.54 Co^ 2+ +2 ^ - arrow Co -0.28 Ni^ 2+ +2 ^

Olympiad workbook Solution View → 33

The conductivity of 0.10 M KCl solution at 298 K is 1.29 × 10^ -2 ~S ~cm^ -1 . The resistance of this solution is found to be 28.44 Ω . Using the same cell, the resistance of 0.10

Olympiad workbook Solution View → 34

When a medal is electroplated with silver (Ag)

Olympiad workbook Solution View → 35

Reaction E_0 / V Agarrow Ag^ + + ^ - -0.80 Cr^ 3+ +3 ^ - arrow 3 Cr -0.74 Zn^ 2+ +2 ^ - arrow Zn -0.76 I_2(~s)+2 ^ - arrow 2 I^ - 0.54 Co^ 2+ +2 ^ - arrow Co -0.28 Ni^ 2+ +2 ^

Olympiad workbook Solution View → 36

The reduction of O_2 to H_2 O in acidic solution has a standard reduction potential of 1.23 V . If the pH of the acid solution is increased by one unit, half cell potential will

Olympiad workbook Solution View → 37

From the given standard electrode potentials array ll Sn^ 4+ (aq)+2 ^ - arrow Sn^ 2+ (aq) & E^0=0.15 ~V Br_2(l)+2 ^ - arrow 2 Br^ - (aq) & E^0=1.07 ~V array The approximate free

Olympiad workbook Solution View → 38

Concentration of K^ + ions inside a biological cell was found to be 25 times higher than that outside. The magnitude of the potential difference between the two sides of the cell

Olympiad workbook Solution View → 39

The standard redox potential for the reaction 2 H_2 O arrow O_2+4 H^ + +4 ^ - is -1.23 V . If the same reaction is carried out at 25^ ^ ^ ∘ C and at pH=7 , the potential will be

Olympiad workbook Solution View → 40

The standard electrode potential (E^0) of the Daniel cell is 1.1 V and the overall cell reaction can be represented as Zn(s)+Cu^ 2+ (aq) arrow Zn^ 2+ (aq)+Cu(s) . Under which of

Olympiad workbook Solution View → 41

If the standard electrode potentials of Fe^ 3+ / Fe and Fe^ 2+ / Fe are -0.04 V and -0.44 V respectively, then that of Fe^ 3+ / Fe^ 2+ is

Olympiad workbook Solution View → 42

Molten NaCl is electrolysed for 35 minutes with a current of 3.50 A at 40^ ^ ^ ∘ C and 1 bar pressure. Volume of chlorine gas evolved in this electrolysis is

Olympiad workbook Solution View → 43

An electrochemical cell was constructed with Fe^ 2+ / Fe and Cd^ 2+ / Cd at 25^ ^ ^ ∘ C with initial concentrations of [Fe^ 2+ ]=0.800 M and [Cd^ 2+ ]=0.250 M . The EMF of the

Olympiad workbook Solution View → 44

The Galvanic cell can be represented as Zn / Zn^ 2+ (0.1 M) / / Cu^ 2+ (0.1 M) / Cu . Among the following, the cell that can produce an EMF more than that of the Galvanic cell is

Olympiad workbook Solution View → 45

If the ratio of the concentrations of the oxidized and reduced forms of a species in an electrochemical reaction can be given as [Ox] /[Red]=1.0 × 10^ -3 , the correct expression

Olympiad workbook Solution View → 46

A sample of water from a water tank has a resistance of 100 Ω at 298 K , when placed in a conductivity cell of cell constant 0.2 ~m^ -1 . On dissolving 58.5 g of NaCl in the water

Olympiad workbook Solution View → 47

The reaction that takes place during charging of the lead storage cell is given below 2 PbSO_4(~s)+2 H_2 O(ℓ) arrow Pb(~s)+PbO(~s)+2 H_2 SO_4(aq) If a current of 10.0 A is passed

Olympiad workbook Solution View → 48

When the pH of the system is increased by 2.0 units, maximum decrease in half cell potential for the reaction will be observed in

Olympiad workbook Solution View → 49

The correct order of the following oxidizing agents in basic aqueous medium is: array ll CrO _ 4 ^ 2- / Cr^ 3+ & E^0=- 0.11 ~V FeO _ 4 ^ 2- / Fe^ 3+ and E^0=+ 0.72 ~V MnO _ 4 ^ 2

Olympiad workbook Solution View → 50

Electrolysis of aqueous CuSO_4(0.1 M) was carried out in two cells I and II. In I, the electrodes are of Cu and in II they were of Pt . As the electrolysis proceeds pH of the

Olympiad workbook Solution View → 51

A half-cell reaction represented by (i) as given below Fe(OH)_2(~s)+2 e^ - arrow Fe(~s)+2 OH^ - (aq) E^ =-0.9 ~V (i) takes place in two different electrochemical cells, I and II

Olympiad workbook Solution View → 52

Latimer diagrams are the compact representations of electrochemical equilibria in substances of multiple oxidation states. The value of the potential, x , in the Latimer diagram

Olympiad workbook Solution View →
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Main Electrochemistry list

The larger JEE Electrochemistry list is under Chemistry (526 questions).

Related JEE NSEC chapters

Some Basic Concepts of Chemistry (60)Thermodynamics (C) (50)Structure of Atom (50)General Organic Chemistry (44)Chemical Kinetics (42)Chemical Bonding and Molecular Structure (34)Coordination Compounds (33)Hydrocarbons (29)Solid State (22)Ionic Equilibrium (20)Alcohols Phenols and Ethers (19)Solutions (18)

Electrochemistry in other exams

NEET Electrochemistry (865)BITSAT Electrochemistry (29)