Electro chemistry practice · Medium

Is the reaction, $2\mathrm{Al} + 3\mathrm{F}{\mathrm{e}^{2 + }} \to 2\mathrm{A}{\mathrm{l}^{3 + }} + 3\mathrm{Fe}$ possible?

The value of electronic charge is equal to :

${E_1},{E_2}$ , and ${E_3}$ are the emfs of the following three galvanic cells respectively
I. Zn (s) |$Z{n^{2 + }}$ (1 M) || $\mathrm{C}{\mathrm{u}^{2 + }}$ (0.1 M) | Cu (s)
II. Zn (s) |$Z{n^{2 + }}$ (1 M) || $\mathrm{C}{\mathrm{u}^{2 + }}$ (1 M) | Cu (s)
III. Zn (s) | $Z{n^{2 + }}$ (0.1 M) || $\mathrm{C}{\mathrm{u}^{2 + }}$ (1 M) | Cu (s)
Which one of the following is true?

Which of the following reactions is correct for a given electrochemical cell at ${25^ \circ }C$?

$\mathrm{Pt}\left| {\mathrm{B}{\mathrm{r}_2}\left( \mathrm{g} \right)} \right|\mathrm{B}{\mathrm{r}^ - }\left( \mathrm{g} \right)||\mathrm{C}{\mathrm{l}^ - }\left( {aq} \right)\left| {\mathrm{C}{\mathrm{l}_2}\left( \mathrm{g} \right)} \right|\mathrm{Pt}$

The hydrogen electrode is dipped in a solution of pH = 3 at ${25^ \circ }C$. The reduction potential of the cell would be :

Assertion: When aqueous sodium chloride solution is electrolysed, Oxygen gas is produced at the anode.

Reason: It is due to the overpotential for oxidation of water to oxygen.

EMF of hydrogen electrode in term of pH is (at 1 atm pressure)

Indicator electrode is :

$\mathrm{Cu}\left( {\mathrm{II}} \right)$ sulphate solution is treated separately with $\mathrm{KCl}$ and KI. In which case, $\mathrm{C}{\mathrm{u}^{2 + }}$ be reduced to $\mathrm{C}{\mathrm{u}^ + }?$

Equal quantities of electricity are passed through three voltameters containing $\mathrm{FeSO}_4, \mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3$, and $\mathrm{Fe}\left(\mathrm{NO}_3\right)_3$. Consider the following statements in this regard:
(1) The amount of iron deposited in $\mathrm{FeSO}_4$ and $\mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3$ is equal
(2) The amount of iron deposited in $\mathrm{Fe}\left(\mathrm{NO}_3\right)_3$ is two thirds of the amount of iron deposited in $\mathrm{FeSO}_4$
(3) The amount of iron deposited in $\mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3\,\mathrm{Fe}\left(\mathrm{NO}_3\right)_3$ is equal
Of these statements:

Which of the following chemical reactions represents Hall-Heroult Process?

The standard electrode potential is measured by

Assertion (A) $E_{\text {cell }}$ increases with increase in concentration of $\mathrm{Ag}^{+}$ions.

Reason (R) $E_{\text {cell }}$ has positive value.

Which of the following aqueous solution will have the maximum specific conductance?

How much charge is present on 3 grams of $CO_3^{2 - }$ ions?

Which of the following is the use of electrolysis?

The products formed when an aqueous solution of ${NaBr}$ is electrolysed in a cell having inert electrodes are:

Which process involves corrosion?

Which is the correct relationship between equilibrium constant and standard reduction potential of cell?

Galvanization is applying a coating of:

One mole of electrons passes through each of the solution of $AgN{O_3},\,CuS{O_4}$ and $AlC{l_3}$ when $Ag,Cu$ and $Al$ are deposited at cathode. The molar ratio of $Ag,Cu\,\,\mathrm{and}\,Al$ deposited are

$E_{Cu}^ \circ = 0.34V,E_{Zn}^ \circ = 0.76V$ . A Daniel cell contains 0.1 M $\mathrm{ZnS}{\mathrm{O}_4}$ solution and 0.01 M $\mathrm{CuS}{\mathrm{O}_4}$ solution at its electrodes. EMF of the cell is

The equivalent conductivity of $\mathrm{KCl}$ at infinite dilution is 130 ${\rm{mho {\kern 1pt} {\kern 1pt}c}}{\mathrm{m}^2}{\kern 1pt} {\kern 1pt}\mathrm{e}{\mathrm{q}^{ - 1}}$. The transport number of $\mathrm{C}{\mathrm{l}^ - }$ ion in $\mathrm{KCl}$ at the same temperature is 0.505. The transport number of ${\mathrm{K}^ + }$ ion is :

The number of electrons transferred (lost or gained) during the reactions $Fe + {H_2}O \to F{e_3}{O_4} + {H_2}$

Assertion: On increasing dilution, the specific conductance keep on increasing.

Reason: On increasing dilution, degree of ionisation ofweak electrolyte increases and molality of ions also increases.

In mercury cell electrolyte used is

For cell reaction,

$\mathrm{Zn} + \mathrm{C}{\mathrm{u}^{2 + }} \to \mathrm{Z}{\mathrm{n}^{2 + }} + \mathrm{Cu}$

Cell representation is

When lead accumulator is charged, it is :

On the basis of electrochemical theory of aqueous corrosion, the reaction occurring at the cathode is

Faraday's law of electrolysis are related to the