11. (c) The following table shows the tests a student performed on four aqueous solutions A, B, C and D. Write down on your answer script the observations (i) to (iv) that were made. Test Observations Conclusions (i) To solution A, barium chloride solution and dilute hydrochloric acid were added. (i) A contains SO42- ions (ii) To solution B sodium hydroxide solution was added. (ii) B contains Fe3+ ions (iii) To solution C ammonium hydroxide was added slowly till in excess. (iii) C contains Cu2+ ions (iv) To solution D silver nitrate solution and dilute nitric acid were added. (iv) D contains Cl- ions