In a dry cell,the reaction which takes place at the zinc anode is:

The standard electrode potential of $Zn^{2+}/Zn$ is $-0.76\, V$ and that of $Cu^{2+}/Cu$ is $0.34\, V$. The emf $(V)$ and the free energy change $(kJ\, mol^{-1})$,respectively for a Daniell cell will be

What is the molar conductivity of $CH_3-CO_2H$ at infinite dilution?
Given that,
$\wedge_{m}^{o}(CH_3-CO_2)_2Ba = x_1 \ S \ cm^2 \ mol^{-1}$
$\wedge_{m}^{o}(BaCl_2) = x_2 \ S \ cm^2 \ mol^{-1}$
$\wedge_{m}^{o}(HCl) = x_3 \ S \ cm^2 \ mol^{-1}$

Which statement is incorrect for a galvanic cell?

$A$ moving coil galvanometer has $150$ equal divisions. Its current sensitivity is $10 \text{ divisions per milliampere}$ and voltage sensitivity is $2 \text{ divisions per millivolt}$. In order that each division reads $1 \text{ V}$,the resistance in ohms needed to be connected in series with the coil will be

The Gibbs energy for the decomposition of $Al_2O_3$ at $500^oC$ is as follows:
$\frac{2}{3} Al_2O_3 \rightarrow \frac{4}{3} Al + O_2$
$\Delta_rG = +960 \ kJ \ mol^{-1}$
The potential difference needed for the electrolytic reduction of aluminium oxide $(Al_2O_3)$ at $500^oC$ is at least ........ $V$.