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QJEE MAIN 2026
200 cc of $x \times 10^{-3} \mathrm{M}$ potassium dichromate is required to oxidise 750 cc of 0.6 M Mohr's salt solution in acidic medium. Here...
JEE MainChemistryEasy
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QJEE MAIN 2026
Consider the following redox reaction taking place in acidic medium $$ \mathrm{BH}_4^{-}(a q)+\mathrm{ClO}_3^{-}(a q) \longrightarrow \mathrm{H}_2 \mathrm{BO}_3^{-}(a q)+\mathrm{Cl}^{-}(a q) $$ If the Nernst equation for...
JEE MainChemistryEasy
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QJEE MAIN_2026_
For strong electrolyte $\Lambda_m$ increases slowly with dilution and can be represented by the equation
$$
\Lambda_{\mathrm{m}}=\Lambda_{\mathrm{m}}^{\cdot}-A c^{1 / 2}
$$
JEE MainChemistryMedium
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QJEE MAIN 2026
Electricity is passed through an acidic solution of $\mathrm{Cu}^{2+}$ till all the $\mathrm{Cu}^{2+}$ was exhausted, leading to the deposition of 300 mg of Cu metal....
JEE MainChemistryMedium
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QJEE MAIN 2026
Consider the above electrochemical cell where a metal electrode ( $M$ ) is undergoing redox reaction by forming $\mathrm{M}^{+}\left(\mathrm{M} \rightarrow \mathrm{M}^{+}+\mathrm{e}^{-}\right)$. The cation $\mathrm{M}^{+}$is present...
JEE MainChemistryMedium
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QJEE MAIN 2026
MX is a sparingly soluble salt that follows the given solubility equilibrium at 298 K . $\operatorname{MX}(\mathrm{s}) \square \mathrm{M}^{+}(\mathrm{aq})+\mathrm{X}^{-}(\mathrm{aq}) ; \quad \mathrm{K}_{\mathrm{sp}}=10^{-10}$ If the standard...
JEE MainChemistryHard
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QJEE MAIN 2026
In the given electrochemical cell, $\mathrm{Ag}(\mathrm{s})|\mathrm{AgCl}(\mathrm{s})| \mathrm{FeCl}_2(\mathrm{aq}), \mathrm{FeCl}_3(\mathrm{aq}) \mid \mathrm{Pt}(\mathrm{s})$ at 298 K , the cell potential $\left(\mathrm{E}_{\text {cell }}\right)$ will increase when :
JEE MainChemistryMedium
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QJEE MAIN 2026
For a closed circuit Daniell cell, which of the following plots is the accurate one at a given temperature?
JEE MainChemistryMedium
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QJEE MAIN 2026
Consider the following electrochemical cellin $$ \mathrm{Pt}\left|\mathrm{O}_2(\mathrm{~g})(\mathrm{lbar})\right| \mathrm{HCl}(\mathrm{aq}) \| \mathrm{M}^{2+}(\mathrm{aq}, 1.0 \mathrm{M}) \mid \mathrm{M}(\mathrm{~s}) $$ The pH above which, oxygen gas would start to evolve...
JEE MainChemistryMedium
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QJEE MAIN 2026
Consider the following electrochemical cell at 298 K $\mathrm{Pt}\left|\mathrm{HSnO}_2^{-}(\mathrm{aq})\right| \mathrm{Sn}(\mathrm{OH})_6{ }^{2-}(\mathrm{aq})\left|\mathrm{OH}^{-}(\mathrm{aq})\right| \mathrm{Bi}_2 \mathrm{O}_3(\mathrm{~s}) \mid \mathrm{Bi}(\mathrm{s})$. If the reaction quotient at a given time...
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