1
IAT (IISER) 2024
MCQ (Single Correct Answer)
+4
-1

Consider the following data for KCl solution at a particular temperature. What is the value of the limiting molar conductivity?

$$ \begin{array}{|c|c|} \hline \text { Concentration }\left(\mathrm{mol} \mathrm{~L}^{-1}\right) & \text { Molar Conductivity }\left(\mathrm{S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\right) \\ \hline 1 \times 10^{-4} & 149.1 \\ \hline 9 \times 10^{-4} & 147.1 \\ \hline \end{array} $$

A
$149.2 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
B
$150.1 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
C
$151.1 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
D
$152.1 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
2
IAT (IISER) 2022
MCQ (Single Correct Answer)
+4
-1

An aqueous solution contains 1.0 M of $\mathrm{X}^{2+}$ and 0.001 M of $\mathrm{Y}^2+$ ions at $25^{\circ} \mathrm{C} . \mathrm{X}^{2+}$ and $\mathrm{Y}^{2+}$ ions do not interact with each other. This solution is put in an electrolytic cell and the voltage is gradually increased till a current begins to flow through the cell. The voltage is maintained at this point and a deposit is observed on the cathode. What is the composition of the material deposited on the cathode?

(Given: Atomic weight of $X$ is 63 and $Y$ is 200.)

$$ \begin{aligned} & X^{2+}+2 e^{-} \rightarrow X, E^0=0.35 \\ & Y^{2+}+2 e^{-} \rightarrow Y, E^0=0.40 \mathrm{~V} \end{aligned} $$

( $E^0$ is the standard reduction potential.)

A
Only Y
B
$24 \% X$ and $76 \% Y$ by weight
C
Only X
D
$98 \% X$ and $2 \% Y$ by weight
IAT (IISER) Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12