Given below are two statements : Statement I : Mohr's salt is composed of only three types of ions-ferrous,…

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 $\mathrm{x}_1, \mathrm{x}_2$ and $\mathrm{x}_3 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$, respectively then the molar conductance for Mohr's salt solution at infinite dilution would be given by $\mathrm{x}_1+\mathrm{x}_2+2 \mathrm{x}_3$
In the light of the given statements, choose the correct answer from the options given below :
  1. Both statements I and Statement II are false
  2. Statement I is false but Statement II is true
  3. Statement I is true but Statement II are false
  4. Both statements I and Statement II are true

Solution

Mohr's salt : $\mathrm{FeSO}_4 \cdot\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$
Using Kohlrousch law
$\lambda_{\mathrm{m}}^{\infty}(\text { Mohr's salt })=\mathrm{x}_1+2 \mathrm{x}_2+2 \mathrm{x}_3$

Asked in: JEE Main 2025 (07 Apr Shift 1)

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