Consider the following electrochemical cell : Pt{| O_2(g)(1 bar) |} HCl(aq) \| M^{2+}(aq, 1.0 M) ∣ M(s) The pH above which, oxygen gas would start to evolve at anode is \_\_\_\_ (nearest integer). \left[\begin{array}{c}\\\\text{ Given: }\\ & E_{M^{2+\end{array} \/ M}^{o}=0.994 V ; , E_{O_2 \/ H_2 O}^{o}=1.23 V \}}\text{ standard reduction potential } \text{ and } \frac{RT}{F}(2.303) [22 Jan 2026 Shift 2]

Electrochemistry Part 2

Section: Chemistry

Question : 9 of 117

Marks: +1, -0

Consider the following electrochemical cell :
Pt|O2(g)(1bar)|HCl(aq)|M2+(aq,1.0M)∣M(s) The pH above which, oxygen gas would start to evolve at anode is ____ (nearest integer).
[

‌ Given: ‌	EM2+∕Mo=0.994V
‌	EO2∕H2Oo=1.23V

}‌ standard reduction potential ‌‌‌‌ and ‌‌

(2.303)

[22 Jan 2026 Shift 2]

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