Given below is the plot of the molar conductivity vs sqrttextconcentration for KCl in aqueous solution.
Molar conductivity vs root concentration graph for Q46 - JEE Main 2025 Morning
The image features a standard linear plot tracing electrolytic molar conductance trends over root concentration variations.
If, for the higher concentration of KCl solution, the resistance of the conductivity cell is 100Omega then the resistance of the same cell with the dilute solution is mathrmxOmega The value of mathbfx is (Nearest integer)

Numerical Answer Type:
Enter a numerical value Answer: 150 to 150 +4 marks

Solution & Explanation

### Related Formula Conductivity relationship with cell parameters: kappa = G cdot G^* = fracG^*R lambda_m = frackappa times 1000C where G^* represents the static cell constant. ### Step 1: Setting Up Ratios Using concentration subscripts c (concentrated) and d (dilute): frackappa_ckappa_d = fracR_dR_c Expressing conductivity through molar conductivity values: kappa = fraclambda_m cdot C1000 frac(lambda_m cdot C)_c(lambda_m cdot C)_d = fracR_dR_c Substituting the graphical read coordinates (C_c = 0.15^2, C_d = 0.1^2 with scaled lambda_m parameters): frac100 cdot (0.15)^2150 cdot (0.1)^2 = fracR_d100 R_d = 150\,Omega ### Pattern Recognition Sees: Resistance correlation across specific graph coordinates. Shortcut: Equate cell parameters through kappa propto frac1R and solve for the target resistance directly. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 12 Chemistry: Electrochemistry

Reference Study Guides

More Electrochemistry Previous-Year Questions — Page 6

Q65 jee_main_2024_31_jan_morning Batteries
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:
  • A. textB, C and E only
  • B. textA, B, C, D and E
  • C. textA, B, C and D only
  • D. textB, D and E only

Solution

### Core Logic Mn, Ni, and Cd metals are predominantly used in battery industries. - Mn is used in dry cells (Leclanche cell). - Ni and Cd are used in Nickel-Cadmium (Ni-Cd) rechargeable batteries. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 12 Chemistry: Electrochemistry
Q67 jee_main_2024_31_jan_morning Electrolytic Conductance
Identify the factor from the following that does not affect electrolytic conductance of a solution.
  • A. textThe nature of the electrolyte added.
  • B. textThe nature of the electrode used.
  • C. textConcentration of the electrolyte.
  • D. textThe nature of solvent used.

Solution

### Core Logic Conductivity of an electrolytic cell is affected by the concentration of the electrolyte, the nature of the electrolyte, and the nature of the solvent. It does not depend on the nature of the electrode used. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 12 Chemistry: Electrochemistry
Q90 jee_main_2024_31_jan_morning Faraday's Laws of Electrolysis
One Faraday of electricity liberates x times 10^-1 gram atom of copper from copper sulphate, x is
Numerical Answer. Answer: 5 to 5

Solution

### Core Logic The reduction reaction for copper is: Cu^2+ + 2e^- rightarrow Cu This shows that 2 moles of electrons (2 Faraday) are required to deposit 1 mole (or 1 gram atom) of Cu. Therefore, 1 Faraday of electricity will deposit: frac12 = 0.5 text moles of Cu ### Step 1: Finding x 0.5 text mole = 0.5 text gram atom = 5 times 10^-1 text gram atom Hence, x = 5. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 12 Chemistry: Electrochemistry

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