When 0.1 mol MnO$_4^{2-}$ is oxidized, the quantity of electricity required to completely convert MnO$_4^{2-}$ to MnO$_4^-$ is

The weight of silver (At. wt. = 108) displaced by a quantity of electricity which displaces 5600 mL of O$_2$ at STP will be

A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as

The function of the ‘Sodium pump’ is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of this pump?

In the electrochemical cell $$Zn$|$ZnSO$_4(0.1 M) ||$CuSO$_4 (1.0 M)|$Cu$,$the emf of this Daniel cell is $E_1.$ When the concentration of ZnSO$_4$ is changed to 1.0 M and that of CuSO$_4$ changed to 0.01 M, the emf changed to $E_2.$ From the following, which one is the relationship between $E_1$ and $E_2 ($Given:$\frac{RT}{F} = 0.059)?$

For the cell reaction$\\ {2Fe}^{3+} (aq) + 2I^{-} (aq) \rightarrow 2Fe^{2+} (aq) + I_2 (s) \\$The standard Gibbs energy $(\Delta G^\circ)$ of the cell reaction is:$\\$(Given: $E^\circ_{cell} = 0.24$ V at $298$ K)

For a cell involving one electron $E^\circ_{cell} = 0.59$ V at $298$ K, the equilibrium constant for the cell reaction is:

The number of Faradays (F) required to produce 20 g of calcium from molten CaCl$_2$ (Atomic mass of Ca$= 40$ g mol$^{-1})$ is:

The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP, and with Na, is responsible for the transmission of nerve signals.

On electrolysis of dilute sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be:

The molar conductance of$NaCl, HCl, CH_3COONa$ at infinite dilution are $126.45, 426.16,$ and $91.0$ S cm$^2$ mol$^{-1}$ respectively. The molar conductance of $CH_3COOH$at infinite dilution is: Choose the right option for your answer.

The molar conductivity of $0.007$ M acetic acid is $20$ S cm$^2$ mol$^{-1}.$ What is the dissociation constant of acetic acid?$\newline$(Given: $\Lambda_{{H}^+}^0 = 350 S cm^2 mol^{-1}, \Lambda_{{CH}_3{COO}^-}^0 = 50$ S cm$^2$ mol$^{-1})$

Given below are half-cell reactions:$\\$MnO$_4^- + 8H^+ + 5e^- \rightarrow$Mn$^{2+} + 4H_2O, \quad E^\circ_{Mn^{2+}/MnO_4^-} = -1.510 V \\$O$_2 + 2H^+ + 2e^- \rightarrow H_2O, \quad E^\circ_{0_2/H_2O} = +1.223 V \\$Will the permanganate ion, MnO$_4^-$ liberate O$_2$ from water in the presence of an acid?

At 298 K, the standard electrode potentials of $$Cu$^{2+}/$Cu$,$Zn$^{2+}/$Zn$,$Fe$^{2+}/$Fe$$ and $$Ag$^{+}/$Ag$$ are 0.34 V, -0.76 V, -0.44 V and 0.80 V, respectively.$\\$On the basis of standard electrode potential, predict which of the following reactions cannot occur?

Find the emf of the cell:$\\$Ni(s) + 2Ag$^+(0.001 M) \rightarrow$Ni$^{2+} (0.001 M) + 2Ag(s) \\$(Given that $E^\circ_{cell} = 1.05$ V, $\frac{2.303RT}{F} = 0.059$ at 298 K)

The conductivity of centimolar solution KCl at 25$^\circ$C is 0.0210 ohm$^{-1}$ cm$^{-1}$ and resistance of the cell containing the solution at 25$^\circ$C is 60 ohm. The value of cell constant is: