JEE Main 2020 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 8 January 2020, Shift 2, Chemistry Q48

Question 48 of 75 in this shift, Chemistry question 23 of 25, Section B.

For an electrochemical cell

\mathrm{Sn(s)|Sn^{2+}(aq,\ 1M)||Pb^{2+}(aq,\ 1M)|Pb(s)}

the ratio

\frac{[\mathrm{Sn^{2+}}]}{[\mathrm{Pb^{2+}}]}

when this cell attains equilibrium is __________.

\left(\text{Given : } \mathrm{E^0_{Sn^{2+}|Sn}} = -0.14\,\mathrm{V},\ \mathrm{E^0_{Pb^{2+}|Pb}} = -0.13\,\mathrm{V},\ \frac{2.303\mathrm{RT}}{\mathrm{F}} = 0.06\right)

Official answer

2.13 to 2.17

NTA final key (Jan 2020). Any value in the range scored.

Same idea in other shifts