Electrochemistry

What is the molar conductivity of $0.02$ M KI solution if its conductivity is $4.37 \times 10^{-4}\,\Omega^{-1}\,\text{cm}^{-1}$ ?

What is the quantity of electricity required to produce $8$ g of Mg (molar mass = $24\ \text{g mol}^{-1}$) from $\text{MgCl}_2$ solution ?

Which of the following reactions occurs at cathode during recharging of lead accumulator ?

Which of the following expressions indicates the correct relationship between molar conductivity of strong electrolyte and its concentration?

If molar conductance at infinite dilution for $\text{CH}_3\text{COO}^-$ and $\text{H}^+$ ions are $50\ \text{S cm}^2\ \text{mol}^{-1}$ and $350\ \text{S cm}^2\ \text{mol}^{-1}$ respectively, molar conductivity of $5 \times 10^{-2}$ M $\text...

Determine the electrode potential of $\text{Sn}^{2+}(0.01\text{M})\ |\ \text{Sn(s)}$ at $25^\circ\text{C}$ if $E^\circ_{\text{Sn}}$ is $-0.136$ V.

During the electrolysis of aqueous NaCl the product formed at cathode is?

What is the conductivity of $0.02\ \text{M}\ \text{AgNO}_3$ solution having cell constant $1.2\ \text{cm}^{-1}$ and resistance $95.0\ \text{ohms}$ ?

What is number of moles of electron passed when a current of $2$ Amp flows through solution of electrolyte for $10$ minutes?

What must be the molarity of $\text{BaCl}_2$ solution to have molar conductivity $240\,\Omega^{-1}\text{cm}^2\text{mol}^{-1}$ and conductivity $0.012\,\Omega^{-1}\text{cm}^{-1}$ at $25^\circ\text{C}$ ?

What is molar conductivity of $\text{CH}_3\text{COOH}$ at zero concentration if the molar conductivities of $\text{H}_2\text{SO}_4$, $\text{K}_2\text{SO}_4$ and $\text{CH}_3\text{COOK}$ at zero concentrations are respectively x, y and z $\O...

Which of the following equimolar solutions is the best conductor of electricity at same temperature ?

Which of the following net cell reactions occurs in a galvanic cell containing cadmium electrode and standard hydrogen electrode?$\text{E}^\circ_{(\text{Cd}^{2+}_{(aq)}|\text{Cd}_{(s)})} = -0.403\ \text{V}$.

For a certain redox reaction in galvanic cell $\text{X}_{(s)} + \text{Y}^{2+}_{(aq)} \longrightarrow \text{X}^{2+}_{(aq)} + \text{Y}_{(s)}$, $\text{E}^\circ$ cell is $0.0296\ \text{V}$ at $298\ \text{K}$. What is equilibrium constant of rea...

What happens in the oxidation number of Mn during working of dry cell.

If standard reduction potential of four electrodes A, B, C, D are $+2.5\,\text{V}, +3.0\,\text{V}, -2.0\,\text{V}$ and $-1.5\,\text{V}$ respectively. When is the standard emf of cell maximum?

If standard reduction potential of Zn, Ni and Fe are $-0.76\,\text{V}$, $-0.23\,\text{V}$ and $-0.44\,\text{V}$ respectively. For the reaction (Stated below) to be spontaneous find out electrodes X and Y considering above electrode potentia...

A galvanic cell consist copper electrode and standard hydrogen electrode. If $E^\circ\left(\text{Cu}^{+2}_{(aq)} | \text{Cu}_{(s)}\right) = +0.34\,\text{V}$, then identify a reaction taking place at positive electrode during working of cell...

The conductivity of 0.02 M of KCl solution at 298 K is 0.0123 $\text{ohm}^{-1}\ \text{cm}^{-1}$. If the resistance of the cell containing this solution is 120 ohms, what is the value of the cell constant ?

Which of the following hot aqueous solutions is used to dip carbon rods of $\text{H}_2 - \text{O}_2$ fuel cell ?

If the emf of cell, $\text{Cu}_{(s)} \mid \text{Cu}^{2+}_{(1M)} \| \text{Ag}^{+}_{(1M)} \mid \text{Ag}$ is 0.463 V at $25\ ^\circ\text{C}$ and standard potential of Cu electrode is 0.337 V. Find the standard potential of Ag electrode

If standard reduction potential $(E^0)$ of $\left(\text{Al}^{+3}_{(aq)}|\text{Al}_{(s)}\right)$, $\left(\text{Fe}^{+2}_{(aq)}|\text{Fe}_{(s)}\right)$, $\left(\text{Cu}^{+2}_{(aq)}|\text{Cu}_{(s)}\right)$ and $\left(\text{Ag}^{+1}_{(aq)}|\te...

The graphical variation of molar conductivity $(\Lambda)$ against square root of molar concentration $(\sqrt{c})$ of certain electrolyte 'X' is linear with intercept on y axis. Identify X from following.

What is the change in oxidation number of Pb at positive electrode of lead accumulator acting as galvanic cell ?

What happens during the discharge of a lead storage battery?

The cells A and B contain aqueous solutions of ferrous chloride and ferric chloride respectively. The mass of iron deposited by the same quantity of electricity in cells A and B is in the ratio.

Identify the reaction from following so that the standard potential of $\text{Cu}^{+2}/\text{Cu}$ electrode is 0.34 V. with respective to SHE ?

Which of the following reactions takes place at anode during the electrolysis of molten NaCl?

What mass of silver (Atomic mass = 108 g/mol) deposited by a quantity of electricity which displaces 5600 mL of $\text{O}_2$ at STP ?

Which of the following statements is not correct ?

The molar conductivity of $0.04$ M $\text{AB}_2$ type salt solution at $300$ K is $200\,\Omega^{-1}\text{cm}^2\text{mol}^{-1}$. Find the conductivity.

Which from following statements regarding mercury battery is NOT true?

The molar conductivity of $0.01$ M monobasic acid at $25\,^\circ\text{C}$ is $15$ ohm$^{-1}$ cm$^2$ mol$^{-1}$. The molar conductivity of the same acid at infinite dilution is $375$ ohm$^{-1}$ cm$^2$ mol$^{-1}$. Calculate $[\text{H}^+]$ in ...

Which of the following is an electrolyte in dry cell ?

The $E^0_{\text{cell}}$ of $\text{Al}_{(s)} | \text{Al}^{3+}(1\text{M}) || \text{Pb}^{2+}(1\text{M}) | \text{Pb}_{(s)}$ cell is 1.5 V if $E^0_{\text{Pb}}$ is $-0.14$ V then $E^0_{\text{Al}}$ will be

Calculate the concentration of silver nitrate solution if molar conductivity and conductivity of silver nitrate at $25^\circ$C are respectively 120 ohm$^{-1}$ cm$^2$ mol$^{-1}$ and 0.0024 ohm$^{-1}$ cm$^{-1}$.

Identify the correct name of law."At infinite dilution each ion migrates independent of co-ion and contributes to total molar conductivity of an elctrolyte irrespective of the nature of other ion to which it is associated."

Identify from following cell reactions that is spontaneous under standard state of conditions.

Calculate the molar conductivity of 0.2 M KCl solution at 298 K ($k = 0.0248 \ \Omega^{-1}$cm$^{-1}$)

Which of the following solutions will have the highest electrical conductivity?

Which of the following statements is correct regarding the cathode of electrochemical cell ?

Which of the following reaction is possible at anode?

Identify the function of salt bridge.

Which of the following statements is true about the voltaic cell?

Which of the following statements is correct regarding electrolysis of molten NaCl?

At $298$ K, the specific conductance ($\kappa$) of a $0.0020$ M NaCl solution is $2.50 \times 10^{-4} \text{ S cm}^{-1}$. Calculate the molar conductivity ($\Lambda_m$) of the solution in $\text{S cm}^2 \text{ mol}^{-1}$.

Match List I with List II.List I (Conversion)List II (Number of Faraday required)A. $1$ mole of $\text{H}_2\text{O}$ to $\text{O}_2$I. $3F$B. $1$ mol of $\text{MnO}_4^-$ to $\text{Mn}^{2+}$II. $2F$C. $1.5$ mol of Ca from molten $\text{CaCl}...

Which from following options is true when an electrolyte solution is diluted ?

The standard potential of $\text{Cu}^{+2}/\text{Cu}$ is $0.34$ V at $298$ K. Calculate its potential at the same temperature when the $\text{Cu}^{+2}$ ion concentration is $0.1$ M.

What is percent dissociation of $\mathrm{NH}_4 \mathrm{OH}$ if molar conductance at zero concentration for $\mathrm{NH}_4 \mathrm{Cl}$, NaCl and NaOH are 130, 109 and $213 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$ respectively and mola...