Electrochemistry: JEE Main Chemistry Previous Year Questions

363 previous year questions from Electrochemistry. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. $The equivalent conductance of M/32 solution of a weak monobasic acid is 8.0 mho c m^{2} and at infinite dilution is 400 mhos c m^{2} . The dissociation constant of this\dots$
2. $Which out of the following is a correct equation to show change in molar conductivity with respect to concentration for a weak electrolyte, if the symbols carry their usu\dots$
3. $The standard reduction potentials at 295 K for the following half cells are given below: N O_{3}^{-} + 4 H^{+} + 3e- \to NO(g)+2H2O E° = 0.97 V V^{2 +} (aq)\dots$
4. $If the resistance of 0.1 MKCl solution in a conductance cell is 300Ω and conductivity is 0.013 Scm^{- 1}, then the value of cell constant is$
5. $The anodic half-cell of lead-acid battery is recharged using electricity of 0.05 Faraday. The amount of PbSO_{4} electrolyzed in g during the process is\dots$
6. $Based on the data given below:\dots$
7. $In the electrolysis of acidulated water, it is desired to obtain 1.12 cc of hydrogen per second under S.T.P. condition. The current to be passed is$
8. $The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V . The equilibrium constant for the reaction of the cell is$
9. $Two electrolytic cells are connected in series containing CuSO_{4} solution and molten AlCl_{3} . If in electrolysis 0.4 moles of 'Cu' are deposite\dots$
10. $Molar ionic conductivities of divalent cation and anion are 57 S cm^{2} mol^{- 1} and\dots$
11. $An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to$
12. $Consider the following E^{\circ} values E_{F e^{3 +} / F e^{2 +}}^{\circ} = 0.77 V E_{S n^{2 +} / Sn}^{\circ} = - 0.14 V Under standard condit\dots$
13. $Which among the following equations represents the reduction reaction taking place in lead accumulator at positive electrode, while it is being used as a source of electr\dots$
14. $Consider the half‐cell reduction reaction M n^{2 +} + 2 e^{-} \to M n, E^{o} = - 1.18 V M n^{2 +} \to M n^{3 +} + e^{-}, E^{o} = - 1.51 V . The E^{o} for the reaction\dots$
15. $The molar conductivity is maximum for the solution of concentration$
16. $In the cell represented by\dots$
17. $Which among the following metals is employed to provide cathodic protection to iron?$
18. $A metal plate of dimension of (1 \times 2 cm^{2}) has to be coated on both the sides by Cu metal. How long does it take to deposit Cu of\dots$
19. $Consider the following reduction processes :\dots$
20. $Calculate molar conductivity of NH_{4} OH at infinite dilution if molar conductivities of Ba (OH)_{2},\dots$
21. $All the energy released from the reaction X \to Y, Δ_{r} Gº = -193 kJ m o l^{-1} is used for oxidizing M^{+} as M^{+} \to M^{3 +} + 2 e^{-}, Eº = - 0.25 V. Under stan\dots$
22. $On heating one end of a piece of a metal, the other end becomes hot because of$
23. $If 5 ampers of current is passed for 193 seconds through a solution containing Copper salt, 0.32 g of copper is deposited. What is the oxidation state of the\dots$
24. $When a quantity of electricity is passed through CuSO_{4} solution, 0.16 g of copper gets deposited. If the same quantity of electricity is passed th\dots$
25. $Limiting molar conductivity of Mg^{2 +} and Cl^{-} ions in water is 106.0 and 76.3 S cm^{2} mol^{- 1} . The limiting molar conductiv\dots$

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Electrochemistry: JEE Main Chemistry Previous Year Questions

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