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Electrochemistry

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Q JEE-MAIN 2019
The standard electrode potential $E^{\circ}$ and its temperature coefficient $\left(\frac{d E^{\circ}}{d T}\right)$ for a cell are $2 V$ and $-5 \times 10^{-4} V K^{-1}$ at...
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Q JEE MAIN_2019_
Consider the statements S1 and S2: S1: Conductivity always increases with decrease in the concentration of electrolyte. S2 : Molar conductivity always increases with decrease...
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Q JEE-MAIN 2019
Water samples with BOD values of 4 ppm and 18 ppm, respectively, are
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Q JEE MAIN 2019
The standard Gibbs energy for the given cell reaction in kJ mol–1 at 298 K is
$\mathrm{Zn}(\mathrm{s})+\mathrm{Cu}^{2+}(\mathrm{aq}) \longrightarrow \mathrm{Zn}^{2+}(\mathrm{aq})+\mathrm{Cu}(\mathrm{s})$,
$\mathrm{E}^{\circ}=2 \mathrm{~V}$ at 298...
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Q JEE MAIN 2019
The upper stratosphere consisting of the ozone layer protects us from the sun’s radiation that falls in the wavelength region of
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Q JEE MAIN 2020
Potassium chlorate is prepared by the electrolysis of KCl in basic solution. $$ 6 \mathrm{OH}^{-}+\mathrm{Cl}^{-} \rightarrow \mathrm{ClO}^{-}{ }_3+3 \mathrm{H}_2 \mathrm{O}+6 \mathrm{e}^{-} $$
If only $...
JEE Main Chemistry Medium
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Q JEE MAIN 2019
$\wedge_{\mathrm{m}}^{\circ}$ for $\mathrm{NaCl}, \mathrm{HCl}$ and NaA are $126.4,425.9$ and $100.5 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$, respectively. If the conductivity of 0.001 M HA is $...
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Q JEE MAIN 2020
For the given cell; $$ \mathrm{Cu}(\mathrm{~s})\left|\mathrm{Cu}^{2+}\left(\mathrm{C}_1 \mathrm{M}\right) \| \mathrm{Cu}^{2+}\left(\mathrm{C}_2 \mathrm{M}\right)\right| \mathrm{Cu}(\mathrm{~s}) $$ change in Gibbs energy ( $\Delta \mathrm{G}$ ) is negative, if
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Q JEE MAIN 2020
108 g of silver (molar mass $108 \mathrm{~g} \mathrm{~mol}^{-1}$ ) is deposited at cathode from $\mathrm{AgNO}_3(\mathrm{aq})$ solution by a certain quantity of electricity. The volume...
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Q JEE MAIN 2019
For the cell $\mathrm{Zn}(\mathrm{s})\left|\mathrm{Zn}^{2+}(\mathrm{ag}) \| \mathrm{M}^{x+}(\mathrm{ag})\right| \mathrm{M}(\mathrm{s})$, different half cells and their standard electrode potentials are given below
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