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Given below are two statements : Statement-I : Mohr's salt is composed of only three types of ions- ferrous, ammonium and sulfate. Statement-II : If the molar conductance at infinite dilution for ferrous, ammonium and sulfate ions are x1, x2 and x3 S cm2 mol−1, respectively then the molar conductance for Mohr's salt solution at infinite dilution would be given by x1 + x2 + 2x3. In the light of the given statements, choose the correct answer from the options given below: (1) Both Statement-I and Statement-II are false (2) Both Statements-I and Statement-II are true (3) Statement-I is false but Statement-II is true (4) Statement-I is true but Statement-II is false

1. Both Statement-I and Statement-II are false
2. Both Statements-I and Statement-II are true
3. Statement-I is false but Statement-II is true
4. Statement-I is true but Statement-II is false

Correct answer: Statement-I is true but Statement-II is false

Solution

Statement-I is correct as Mohr's salt indeed contains ferrous, ammonium, and sulfate ions. However, Statement-II is incorrect because the molar conductance for Mohr's salt should account for the presence of two sulfate ions, leading to the correct expression being x1 + x2 + 2x3.

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