How many of the following are Lewisacids ?[C Cl_4 , Si F_4 , BF_4^(-), NH_4^(+), overset(* * )(C Cl_2 ) , Mg^(+2), O, HCHO]

How many of the following are Lewisacids ?[C Cl_4 , Si F_4 , BF_4^(-),

1.	How many of the following are Lewisacids ?[C Cl_4 , Si F_4 , BF_4^(-), NH_4^(+), overset(* * )(C Cl_2 ) , Mg^(+2), O, HCHO]
Answer» Solution :` "SIF"_4 , overset(* *) C Cl_2 , MG^(+2), O , HCHO` are lewis ACIDS.