JEE Main 2019 — Electrochemistry Question with Solution
From: JEE Main 2019 (Online) 10th April Morning Slot
Question
Consider the statements S1 and S2
S1 : Conductivity always increases with decrease in the concentration of electrolyte.
S2 : Molar conductivity always increases with decrease in the concentration of electrolyte.
The correct option among the following is :
S1 : Conductivity always increases with decrease in the concentration of electrolyte.
S2 : Molar conductivity always increases with decrease in the concentration of electrolyte.
The correct option among the following is :
Choose an option
Show full solutionCorrect option: D
Correct answer
DS1 is wrong and S2 is correct
Step-by-step explanation
We know conductivity (k) =
V = volume
When concentration decreases volume increases and when volume increases then conductivity (k) decreases.
So, we can say S1 is incorrect.
We know that,
where
m = molar conductivity
k = conductivity
c = concentration
So, when concentration decreases molar conductivity increases.
So, we can say S2 is correct.
V = volume
When concentration decreases volume increases and when volume increases then conductivity (k) decreases.
So, we can say S1 is incorrect.
We know that,
where
m = molar conductivity
k = conductivity
c = concentration
So, when concentration decreases molar conductivity increases.
So, we can say S2 is correct.
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This is a previous-year question from JEE Main 2019, covering the Electrochemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.