1
JEE Main 2022 (Online) 27th June Morning Shift
Numerical
+4
-1
Change Language

The limiting molar conductivities of NaI, NaNO3 and AgNO3 are 12.7, 12.0 and 13.3 mS m2 mol$$-$$1, respectively (all at 25$$^\circ$$C). The limiting molar conductivity of AgI at this temperature is ____________ mS m2 mol$$-$$1.

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2
JEE Main 2022 (Online) 26th June Evening Shift
Numerical
+4
-1
Change Language

Cu(s) + Sn2+ (0.001M) $$\to$$ Cu2+ (0.01M) + Sn(s)

The Gibbs free energy change for the above reaction at 298 K is x $$\times$$ 10$$-$$1 kJ mol$$-$$1. The value of x is __________. [nearest integer]

[Given : $$E_{C{u^{2 + }}/Cu}^\Theta = 0.34\,V$$ ; $$E_{S{n^{2 + }}/Sn}^\Theta = - 0.14\,V$$ ; F = 96500 C mol$$-$$1]

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3
JEE Main 2022 (Online) 25th June Evening Shift
Numerical
+4
-1
Change Language

A solution of Fe2(SO4)3 is electrolyzed for 'x' min with a current of 1.5 A to deposit 0.3482 g of Fe. The value of x is ___________. [nearest integer]

Given : 1 F = 96500 C mol$$-$$1

Atomic mass of Fe = 56 g mol$$-$$1

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4
JEE Main 2022 (Online) 25th June Morning Shift
Numerical
+4
-1
Change Language

In a cell, the following reactions take place

$$\matrix{ {F{e^{2 + }} \to F{e^{3 + }} + {e^ - }} & {E_{F{e^{3 + }}/F{e^{2 + }}}^o = 0.77\,V} \cr {2{I^ - } \to {I_2} + 2{e^ - }} & {E_{{I_2}/{I^ - }}^o = 0.54\,V} \cr } $$

The standard electrode potential for the spontaneous reaction in the cell is x $$\times$$ 10$$-$$2 V 298 K. The value of x is ____________. (Nearest Integer)

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