CBSE Class 12 Chemistry 2025 All Sets Solved Paper

Question : 1 of 16

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Standard electrode potential for

\mathrm{Sn}^{4+}/\mathrm{Sn}^{2+}

couple is +0.15 V and that for the

\mathrm{Cr}^{3+}/\mathrm{Cr}

couple is –0.74 V. The two couples in their standard states are connected to make a cell. The cell potential will be

Solution:

Cell notation

\mathrm{Cr} \, \vert \, \mathrm{Cr}^{3+} \Vert \mathrm{Sn}^{4+} \, \vert \, \mathrm{Sn}^{2+}

E^{0}_{\text{cell}} = E^{0}_{\mathrm{Cr/Cr}^{3+}} + E^{0}_{\mathrm{Sn}^{4+}/\mathrm{Sn}^{2+}}

= 0.74 + 0.15

= 0.89 V

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