The partial pressure of a gas at $25^\circ$C is $0.18$ atm, calculate the concentration of the gas dissolved at the same temperature,
If $K_H$ is $0.15\ \text{mol dm}^{-3}\ \text{atm}^{-1}$

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.

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

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 $\text{CaCl}_2$	III. $1F$
D. $1$ mol of FeO to $\text{Fe}_2\text{O}_3$	IV. $5F$

Choose the correct answer from the options given below :