New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

Electrochemistry question

2023 · 24 Jan · Shift 1 · Q21

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
JEE Main
Chemistry
Electrochemistry
2023 · 24 Jan · Shift 1 · Q21

Electrochemistry question

2023 · 24 Jan · Shift 1 · Q21

JEE MainChemistryElectrochemistryNumerical+4 / −1

At 298 K, a 1 litre solution containing 10 mmol of

\mathrm{C{r_2}O_7^{2 - }}

and 100 mmol of

\mathrm{Cr^{3+}}

shows a pH of 3.0. Given :

\mathrm{C{r_2}O_7^{2 - } \to C{r^{3 + }}\,;\,E^\circ = 1.330}

V and

\mathrm{{{2.303\,RT} \over F} = 0.059}

V The potential for the half cell reaction is

x\times10^{-3}

V. The value of

x

is

\underline{\hspace{2cm}}

Numerical answer

More from Electrochemistry

Choose the correct representation of conductometric titration of benzoic acid vs sodium hydroxide.2023 · MCQ
Consider the cell $Pt (s) ∣ H_{2} (g) (1 atm) ∣ H^{+} (aq, [H^{+}] = 1) ∣∣F e^{3 +} (aq), F e^{2 +} (aq) ∣Pt (s)$ Given $E_{F e^{3 +} /F e^{2 +}}^{o} = 0.771 V$ and $E_{H^{+} /1/2 H_{2}}^{o} = 0 V, T = 298 K$ …2023 · Numerical
$P t (s) ∣ H_{2} (g) (1 ba r) ∣ H^{+} (a q) (1 M) ∣∣ M^{3 +} (a q), M^{+} (a q) ∣ P t (s)$ The $E_{cell}$ for the given cell is 0.1115 V at 298 K when $\frac{[ M ^{+} ( a q ) ]}{[ M ^{3 +} ( a q ) ]} = 1 0^{a}$ The…2023 · Numerical
The standard electrode potential $(M^{3 +} / M^{2 +})$ for V, Cr, Mn & Co are $-$ 0.26 V, $-$ 0.41 V, + 1.57 V and + 1.97 V, respectively. The metal ions which can liberate $H_{2}$ from a dilute acid are :2023 · MCQ
Following figure shows dependence of molar conductance of two electrolytes on concentration. $Λ m o$ is the limiting molar conductivity. The number of $\underline{incorrect}$ statement(s) from the following… Includes diagram2023 · Numerical
The equilibrium constant for the reaction $Zn (s) + S n^{2 +} (aq)$ $⇌$ $Z n^{2 +} (aq) + Sn (s)$ is $1 \times 1 0^{20}$ at 298 K. The magnitude of standard electrode potential of $Sn/S n^{2 +}$ if $E_{Z n^{2 +} /Zn}^{Θ} = - 0.76 V$ …2023 · Numerical
Consider the cell $Pt_{(s)} ∣ H_{2} (g, 1 atm) ∣ H^{+} (aq, 1 M) ∣∣ Fe^{3 +} (aq), Fe^{2 +} (aq) ∣ Pt (s)$ …2023 · Numerical
The electrode potential of the following half cell at $298 K X X^{2 +} (0.001 M) ∥ Y^{2 +} (0.01 M) Y$ is $\times 10^{-2}…2023 · Numerical