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JEE Main 20257 AprilMorning Shift
Exam
JEE Main
Year
2025
Date
7 April
Shift
Morning Shift
Subject
Chemistry
Chapter
Electrochemistry

JEE Main 2025 · 7 April · Morning Shift · Chemistry · Electrochemistry

Given below are two statements : Statement I : Mohr's salt is...

Given below are two statements :
Statement I : Mohr's salt is composed of only three types of ions-ferrous, ammonium and sulphate.
Statement II : If the molar conductance at infinite dilution of ferrous, ammonium and sulphate ions are x1,x2\mathrm{x}_1, \mathrm{x}_2 and x3 S cm2 mol−1\mathrm{x}_3 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}, respectively then the molar conductance for Mohr's salt solution at infinite dilution would be given by x1+x2+2x3\mathrm{x}_1+\mathrm{x}_2+2 \mathrm{x}_3
In the light of the given statements, choose the correct answer from the options given below :

Options

  1. ABoth statements I and Statement II are false
  2. BStatement I is false but Statement II is true
  3. CStatement I is true but Statement II are false
  4. DBoth statements I and Statement II are true

Correct answer

C. Statement I is true but Statement II are false

Step-by-step solution

Mohr's salt : FeSO4⋅(NH4)2SO4⋅6H2\mathrm{FeSO}_4 \cdot\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2O\mathrm{O}<br/>UsingKohlrouschlaw<br/><br />Using Kohlrousch law<br />\lambda_{m\mathrm{m}}^{\infty}( Mohr’s salt \text{ Mohr's salt })=x1+2x2+2\mathrm{x}_1+2 \mathrm{x}_2+2x3\mathrm{x}_3
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