Electrochemistry - JEE Mains PYQs + Mind Maps | JEE 2025 | Shilpi Mam @VedantuMath

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✅ Master the Electrochemistry with Shilpi Mam as she walks you through JEE Mains Previous Year Questions (PYQs) and provides comprehensive mind maps for JEE 2025 preparation. Perfect for aspiring engineers, this video simplifies complex concepts and boosts your exam readiness.
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Important Time Stamps
00:00 - 1:45 = Introduction
01:45 - 05:10 = Ques. No. 1 The standard reduction potentials at 298 K for the following half cells are given below:
NO3– + 4H+ + 3e– → NO(g) + 2H2O Eθ = 0.97 V
V2+(aq) + 2e– → V Eθ = -1.19 V
Fe3+(aq) + 3e– → Fe Eθ = -0.04 V
Ag+(aq) + e– → Ag(s) Eθ = 0.80 V
Au3+(aq) + 3e– → Au(s) Eθ = 1.40 V
The number of metal(s) which will be oxidized by NO3– in aqueous solution is
05:10 - 11:28 = Ques. No. 2 A 5.0 m mol dm3 aqueous solution of KCl has a conductance of 0.55 ms when measured in a cell of cell constant 1.3 cm. The molar conductivity of this solution is
11:28 - 16:28 = Ques. No. 3 The equilibrium constant for the reaction Zn(s) + Sn2 + (aq) ⇌ Zn2+(aq) + Sn(s) is 1 × 1020 at 298 K. The magnitude of standard electrode potential of Sn/Sn2+ if Eo Zn2+/Zn = -0.76V is ______ × 10-2 V. (Nearest integer)
16:28 - 19:28 = Ques. No. 4 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:
19:28 - 24:11 = Ques. No. 5 Consider the cell Pt(s) |H2 (g, 1 atm)| |H+ (aq, 1M)| |Fe3+(aq), Fe2+(aq)| Pt(s) When the potential of the cell is 0.712 V at 298 K, the ratio [Fe2+]/[Fe3+] is Given Fe3+ + e- = Fe2+, Eθ Fe3+, Fe2+ | Pt = 0.771
24:11 - 27:21 = Ques. No. 6 Which one of the following statements is correct for electrolysis of brine solution?
27:21 - 32:06 = Ques. No. 7 A metal surface of 100 cm2 area has to be coated with nickel layer of thickness 0.001 mm. A current of 2 A was passed through a solution of Ni(NO3)2 for ‘x’ seconds to coat the desired layer. The value of x is ____. (ρNi(density of Nickel) is 10 g mL, Molar mass of Nickel is 60 g
mol-1 F = 96500 C mol-1)
32:06 - 35:18 = Ques. No. 8 The resistivity of a 0.8 M solution of an electrolyte is 5 × 10-3Ωcm. Its molar conductivity is _____× 104Ω-1 cm2 mol-1
35:18 - 38:40 = Ques. No. 9 The specific conductance of 0.0025 M acetic acid is 5 × 10-5 S cm-1 at a certain temperature. The dissociation constant of acetic acid is _____ × 10-7. Consider limiting molar conductivity of CH3COOH as 400 S cm2 mol-1
38:40 - 40:05 = Ques. No. 10 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 light of the above statements, choose the correct answer from the options given below:
40:05 - 44:15 = Ques. No. 11 The molar conductivities at infinite dilution of KCl, HCl and CH3COOH are 130.1, 379.4, 95 mho cm2/mol respectively. Calculate molar conductivity at infinite dilution of CH3COOH.

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