Statement-I : Sodium chloride can be precepitated from it’s saturated solution by passing HCl gasStatement-II :Mixture of  H2CO3&HCO3-   acts as acidic buffer

By passing HCl gas through saturated sodium chloride solution, Ionic product of NaCl exceeds solubility product thus it gets precipitated ; The mixture of  H2CO3&HCO3- acts as acidic buffer. It is a mixture of weak acid and its conjugate base ;