Chemistry · 2013
JEE Main · 23 April 2013, Shift 1 · Q53
Given: E^0_1/2 Cl_2 / Cl^- =1.36 V, E_Cr^3+ / Cr^0=-0.74 V, E^0_Cr_2 O_7^2- / Cr^3+ =1.33 V, E^0_MnO_4^- / Mn^2+ =1.51 V The correct order of…
Given :
$$\begin{aligned}
& \mathrm{E}^0_{\frac{1}{2} \mathrm{Cl}_2 / \mathrm{Cl}^{-}}=1.36 \mathrm{~V}, \mathrm{E}_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^0=-0.74 \mathrm{~V}, \\
& \mathrm{E}^0_{\mathrm{Cr}_2 \mathrm{O}_7^{2-} / \mathrm{Cr}^{3+}}=1.33 \mathrm{~V}, \mathrm{E}^0_{\mathrm{MnO}_4^{-} / \mathrm{Mn}^{2+}}=1.51 \mathrm{~V}
\end{aligned}
$$
The correct order of reducing power of the species ( $\displaystyle \mathrm{Cr}, \mathrm{Cr}^{3+}, \mathrm{Mn}^{2+}$ and $\displaystyle \mathrm{Cl}^{-}$) will be :
Official answer
(1)
$\displaystyle \mathrm{Mn}^{2+}<\mathrm{Cl}^{-}<\mathrm{Cr}^{3+}<\mathrm{Cr}$
More from Electrochemistry
- The equivalent conductance of NaCl at concentration C and at infinite dilution are λ_C and λ_∞, respectively. The correct relationship between λ_C…2014
- The conductivity of a weak acid HA of concentration 0.001 mol L^-1 is 2.0 × 10^-5 Scm^-1. If Λ_m^°(HA)=190 Scm^2 mol^-1, the ionization constant…2021
- The E^° (volt) values are: Al^3+ / Al,-1.66, Sc^3+ / Sc,-2.08, Fe^3+ / Fe^2+, +0.77, Hg_2^2+ / Hg,+0.79. Arrangement of cations, Al^3+, Sc^3+, Fe^3+…2022
- In which of the following half cells, electrochemical reaction is pH dependent?2022
- At 298 K, a 1 litre solution containing 10 mmol of Cr_2 O_7^2- and 100 mmol of Cr^3+ shows a pH of 3.0. Given: Cr_2 O_7^2- → Cr^3+; E^°=1.330 V and…2023
- The product, which is not obtained during the electrolysis of brine solution is2023
- The solubility product of a sparingly soluble salt A_2 X_3 is 1.1 × 10^-23. If specific conductance of the solution is 3 × 10^-5 S m^-1, the limiting…2022
- Two Faraday of electricity is passed through a solution of CuSO_4. The mass of copper deposited at the cathode is: (at. mass of Cu=63.5 amu)2015
JEE Main 2013 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.