Chemistry · 2019
JEE Main · 10 January 2019, Shift 2 · Q58
In the cell Pt ( s )| H_2( g, 1 bar )| HCl ( aq )| AgCl ( s )| Ag ( s ) ∣ Pt ( s ) the cell potential is 0.92 V when a 10^-6 molal HCl solution is…
In the cell
$$\mathrm{Pt}(\mathrm{~s})\left|\mathrm{H}_2(\mathrm{~g}, 1 \mathrm{bar})\right| \mathrm{HCl}(\mathrm{aq})|\mathrm{AgCl}(\mathrm{~s})| \mathrm{Ag}(\mathrm{~s}) \mid \mathrm{Pt}(\mathrm{~s})
$$
the cell potential is $\displaystyle 0.92$ V when a $\displaystyle 10^{-6}$ molal HCl solution is used. The standard electrode potential of ( $\displaystyle \mathrm{AgCl} / \mathrm{Ag}, \mathrm{Cl}^{-}$) electrode is :
$$\left\{\text { Given, } \frac{2.303 \mathrm{RT}}{\mathrm{~F}}=0.06 \mathrm{~V} \text { at } 298 \mathrm{~K}\right\}
$$
Official answer
(3)
$\displaystyle 0.20 \mathrm{~V}$
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JEE Main 2019 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.