The standard reduction potentials at 298 {\K} for the following half cells are given below : {\Cr}_2 {\O}_7^{2-}+14 {\H}^{+}+6 {\e}^{-} \rightarrow 2 {\Cr}^{3+}+7 {\H}_2 {\O}, {\E}^{\circ}=1.33 {\V} {\Fe}^{3+}( {\aq})+3 {\e}^{-} \rightarrow {\Fe} {\E}^{\circ}=-0.04 {\V} {\Ni}^{2+}( {\aq})+2 {\e}^{-} \rightarrow {\Ni} {\E}^{\circ}=-0.25 {\V} {\Ag}^{+}( {\aq})+ {\e}^{-} \rightarrow {\Ag} {\E}^{\circ}=0.80 {\V} {\Au}^{3+}( {\aq})+3 {\e}^{-} \rightarrow {\Au} {\E}^{\circ}=1.40 {\V} Consider the given electrochemical reactions, The number of metal(s) which will be oxidized be {\Cr}_2 {\O}_7^{2-}, in aqueous solution is _______. [9 Apr 2024 Shift 1]

Electrochemistry Part 2

Section: Chemistry

Question : 38 of 117

Marks: +1, -0

The standard reduction potentials at 298K for the following half cells are given below :
Cr2O72−+14H++6e−⟶2Cr3++7H2O,E∘=1.33V
Fe3+(aq)+3e−⟶Fe‌E∘=−0.04V
Ni2+(aq)+2e−⟶Ni‌E∘=−0.25V
Ag+(aq)+e−⟶Ag‌E∘=0.80V
Au3+(aq)+3e−⟶Au‌E∘=1.40V
Consider the given electrochemical reactions, The number of metal(s) which will be oxidized be Cr2O72−, in aqueous solution is _______.

[9 Apr 2024 Shift 1]

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