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$^{-1}$.

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

Which of the following is an electrolyte in dry cell ?

The rate of reaction $\text{A} + \text{B} \rightarrow \text{P}$ is $4 \times 10^{-2}\ \text{mol dm}^{-3}\ \text{s}^{-1}$
When $[A] = 0.2\ \text{mole dm}^{-3}$ and $[B] = 0.1\ \text{mole dm}^{-3}$, What is the rate constant of reaction, if it is first order with respect to A and second order with respect to B ?