A homogeneous mixture has the same uniform appearance and composition throughout. 
A heterogeneous mixture consists of visibly different substances or phases. The three phases or states of matter are gas, liquid, and solid.
A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly different substances or phases.
        
             
        
        
        
Its a base
as Na+ dissociates in the water and it has no basic nor acidic properties its neutral]
but the F- that also dissociates has certain basic properties 
hope that helps 
        
             
        
        
        
Answer:
option X^2- as member of group 2A are non metal