JEE MainChemistryElectrochemistryNumerical+4 / −1
A KCl solution of conductivity 0.14 S m 1 shows a resistance of 4.19 in a conductivity cell. If the same cell is filled with an HCl solution, the resistance drops to 1.03 . The conductivity of the HCl solution is 10 2 S m 1. (Round off to the Nearest Integer).
Numerical answer
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Correct answer: 57
- Use the conductivity cell relation
For a conductivity cell,
So,
- Find the cell constant using KCl solution
Given for KCl:
- Conductivity,
- Resistance,
Hence,
- Use the same cell for HCl solution
For HCl:
- Resistance,
Therefore,
- Express in the required form
We need
Now,
Rounded to the nearest integer:
- Final answer
The required integer is:
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