JEE Advanced · 2017 · 21 May 2017 · Paper 2 · Redox Reactions and Electrochemistry

At 300 K, the molar conductivities of the aqueous solutions of three salts at two different concentrations are given below:
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In an electrochemical cell, dichromate ions in aqueous acidic medium are reduced to ${\mathrm{Cr}}^{3+}$. The current (in amperes) that flows through the cell for 48.25 minutes to produce 1 mole of ${\mathrm{Cr}}^{3+}$ is ____.

Use: 1 Faraday $=96500\mathrm{C}{\mathrm{mol}}^{-1}$

An electrochemical cell is fueled by the combustion of butane at 1 bar and 298 K. Its cell potential is $\frac{\mathbf{X}}{\mathbf{F}}\times 10^3$ volts, where $\mathbf{F}$ is the Faraday constant. The value of $\mathbf{X}$ is ____.

Use : Standard Gibbs energi …

In a conductometric titration, small volume of titrant of higher concentration is added stepwise to a larger volume of titrate of much lower concentration, and the conductance is measured after each addition.
The limiting ionic conductivity (${\Lambda }_0$) values (in …

An aqueous solution of hydrazine $\left({\mathrm{N}}_2{\mathrm{H}}_4\right)$ is electrochemically oxidized by ${\mathrm{O}}_2$, thereby releasing chemical energy in the form of electrical energy. One of the products generated from the electrochemical reaction is …

${\mathrm{H}}_2\mathrm{S}$ (5 moles) reacts completely with acidified aqueous potassium permanganate solution. In this reaction, the number of moles of water produced is $\mathbf{x}$, and the number of moles of electrons involved is $\mathbf{y}$. The value of …