Which of the following complex will give white precipitate with barium chloride solution –

Which of the following complexes will give a white precipitate on treatment with a solution of barium nitrate ?

Which of the following complex does not give white precipitate with AgNO_3 ?

Which of the following isomers will give white precipitate with BaCl_2 solution ?

Which of the following complex will give white ppt. with BaCl_(2) solution ?