The kinetics of adsorption for Langmuir and Freundlich isotherms has been explored theoretically on the basis of Statistical Rate Theory (SRT). The Modified Pseudo-First-Order (MPFO) and Pseudo-First-Order (PFO) models were derived from Freundlich isotherm on the basis of Statistical Rate Theory at $c_0\gg c_e$ and at close to equilibrium respectively. Also, for a Langmuirian adsorption MPFO was derived at initial times of adsorption under condition $c_0\gg c_e$ and also Pseudo-First-Order (at close to equilibrium) and Pseudo-Second-Order (PSO) model (at close to equilibrium for $c_0\gg c_e$ and ${\theta }_e\cong 1$) were obtained based on SRT. It has been proven that from Freundlich and Langmuir isotherms the fractional coverage is a linear function of $\sqrt{t}$ at very short initial times of adsorption. Also an useful rate equation was derived at condition $c_0\cong c_e$ from Freundlich isotherm. The theoretical obtained equations from Freundlich and Langmuir isotherms have been examined by several set of experimental data selected from literature.