For the gaseous reaction : $A\left(g\right)⟶$Products, the rate may be expressed as

Method I : $-\frac{1}{V}\cdot \frac{d{n}_A}{dt}=k_1\cdot C_A^n$

Method II : $-\frac{d{P}_A}{dt}=k_2\cdot P_A^n$

where $C_A=\frac{n_A}{V}=$ molar concentration of A and ${\mathrm{p}}_{\mathrm{A}}$ is the partial pressure of A at time 't' and 'n' is the order of reaction. The reaction is occurring at constant temperature, T = 300 K. Assume ideal behaviour of gas. Select the correct statement(s).