Electrochemistry Question 6
Question 6 - 29 January - Shift 1
Following figure shows dependence of molar conductance of two electrolytes on concentration.
$\Lambda \mathring {m}$ is the limiting molar conductivity.
The number of Incorrect statement(s) from the following is
(A) $\Lambda \mathring {m}$ for electrolyte $A$ is obtained by extrapolation
(B) For electrolyte B, vx $\Lambda m$ vs $\sqrt{c}$ graph is a straight line with intercept equal to $\Lambda \mathring {m}$
(C) At infinite dilution, the value of degree of dissociation approach zero for electrolyte B.
(D) $\Lambda \mathring {m}$ for any electrolyte $A$ or $B$ can be calculated using $\lambda^{0}$ for individual ions.
Show Answer
Answer: (2)
Solution:
Statement (A) and Statement (C) are incorrect
The equilibrium constant for the reaction
$Zn(s)+Sn^{2+}(aq) \rightarrow Zn^{2+}(aq)+Sn(s)$ is $1 \times 10^{20}$
at $298 K$. The magnitude of standard electrode potential of $Sn / Sn^{2+}$ if $E _{Zn^{2+} / Zn}^{o}=-0.76 V$ is $\times 10^{-2} V$. (Nearest integer)
Given : $\frac{2.303 RT}{F}=0.059 V$
