Electrochemistry · JEE Advanced previous year questions

2023 2 questions

1. Q392023 · 4 Jun 2023 · Paper 1

   Plotting $1/{\Lambda }_{\mathrm{m}}$ against $c{\Lambda }_{\mathrm{m}}$ for aqueous solutions of a monobasic weak acid ($\mathrm{HX}$) resulted in a straight line with y-axis intercept of P and slope of S. The ratio P/S is $[{\Lambda }_{\mathrm{m}}=\text{molar conductivity}$ ${\Lambda }_{\mathrm{m}}^{\circ }=\text{limiting molar conductivity}$ $c=\text{molar concentration}$ $K_{\mathrm{a}}=\text{dissociation constant of HX}]$

   1. A.$K_{\mathrm{a}}{\Lambda }_{\mathrm{m}}^{\circ }$
   2. B.$K_{\mathrm{a}}{\Lambda }_{\mathrm{m}}^{\circ }/2$
   3. C.$2K_{\mathrm{a}}{\Lambda }_{\mathrm{m}}^{\circ }$
   4. D.$1/(K_{\mathrm{a}}{\Lambda }_{\mathrm{m}}^{\circ })$
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   Answer: A

2. Q372023 · 4 Jun 2023 · Paper 2
   
   1. A.$\mathbf{P}$ is a primary alcohol with four carbons.
   2. B.$\mathbf{Q}$ undergoes Kolbe's electrolysis to give an eight-carbon product.
   3. C.$\mathbf{R}$ has six carbons and it undergoes Cannizzaro reaction.
   4. D.$\mathbf{S}$ is a primary amine with six carbons.
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   Answer: B